diff --git a/libsearch/app-db-common.h b/libsearch/app-db-common.h
new file mode 100644
index 0000000..c8ef2dd
--- /dev/null
+++ b/libsearch/app-db-common.h
@@ -0,0 +1,51 @@
+#ifndef APPDBCOMMON_H
+#define APPDBCOMMON_H
+
+#include <QDir>
+#include <QMetaType>
+#include <QDBusArgument>
+
+namespace UkuiSearch {
+
+#define APP_DATABASE_PATH QDir::homePath()+"/.config/org.ukui/ukui-search/appdata/"
+#define APP_DATABASE_NAME "app-info.db"
+
+struct AppInfoResult
+{
+    QString desktopPath;
+    QString iconName;
+    QString appLocalName;
+    QString firstLetter;
+    QString category;
+    int top;
+    int favorate;
+    int launchTimes;
+    int lock;
+
+    AppInfoResult() : top(0), favorate(0), launchTimes(0), lock(0) {}
+    friend QDBusArgument &operator << (QDBusArgument &argument, const AppInfoResult &infoResult)
+    {
+        argument.beginStructure();
+        argument << infoResult.desktopPath << infoResult.iconName << infoResult.appLocalName << infoResult.firstLetter
+                 << infoResult.category << infoResult.top << infoResult.favorate << infoResult.launchTimes << infoResult.lock;
+        argument.endStructure();
+        return argument;
+    }
+
+    friend const QDBusArgument &operator >> (const QDBusArgument &argument, AppInfoResult &infoResult)
+    {
+        argument.beginStructure();
+        argument >> infoResult.desktopPath >> infoResult.iconName >> infoResult.appLocalName >> infoResult.firstLetter
+                 >> infoResult.category >> infoResult.top >> infoResult.favorate >> infoResult.launchTimes >> infoResult.lock;
+
+        argument.endStructure();
+        return argument;
+    }
+
+};
+
+}
+
+Q_DECLARE_METATYPE(UkuiSearch::AppInfoResult)
+
+#endif // APPDBCOMMON_H
diff --git a/libsearch/appdata/app-info-table-private.h b/libsearch/appdata/app-info-table-private.h
index 7cbe75d..c0ef60d 100644
--- a/libsearch/appdata/app-info-table-private.h
+++ b/libsearch/appdata/app-info-table-private.h
@@ -1,10 +1,13 @@
 #ifndef APPINFOTABLEPRIVATE_H
 #define APPINFOTABLEPRIVATE_H
+
+#include "app-info-table.h"
 #include <QObject>
+#include <QDBusInterface>
 #include <QSqlDatabase>
-#include <app-info-table.h>
 
 namespace UkuiSearch {
+
 class AppInfoTablePrivate : public QObject
 {
     Q_OBJECT
@@ -15,27 +18,36 @@ public:
 
     bool setAppFavoritesState(QString &desktopfp, size_t num);
     bool setAppTopState(QString &desktopfp, size_t num);
+
+    //下面三个暂时未封装
     bool setAppLaunchTimes(QString &desktopfp, size_t num);
     bool updateAppLaunchTimes(QString &desktopfp);
     bool setAppLockState(QString &desktopfp, size_t num);
 
+    //拖动改变置顶和收藏应用位置
+    bool changeFavoriteAppPos(const QString &desktopfp, size_t pos);
+    bool changeTopAppPos(const QString &desktopfp, size_t pos);
+
     bool getAllAppDesktopList(QStringList &list);
     bool getFavoritesAppList(QStringList &list);
     bool getTopAppList(QStringList &list);
     bool getLaunchTimesAppList(QStringList &list);
     bool getAppCategory(QString &desktopfp, QString &category);
 
-    bool getAppInfoResults(QVector<AppInfoTable::AppInfoResult> &appInfoResults);
+    //获取所有应用信息并存到一个结构体中
+    bool getAppInfoResults(QVector<AppInfoResult> &appInfoResults);
 
+    //获取单个应用的某个状态（锁定，置顶，打开状态，收藏）
     bool getAppLockState(QString &desktopfp, size_t &num);
     bool getAppTopState(QString &desktopfp, size_t &num);
     bool getAppLaunchedState(QString &desktopfp, size_t &num);
     bool getAppFavoriteState(QString &desktopfp, size_t &num);
 
+    //添加快捷方式
     bool addAppShortcut2Desktop(QString &desktopfp);
     bool addAppShortcut2Panel(QString &desktopfp);
 
-    bool getInstallAppMap(QMultiMap<QString, QStringList> &installAppMap);
+    //搜索接口
     bool searchInstallApp(QString &keyWord, QStringList &installAppInfoRes);
     bool searchInstallApp(QStringList &keyWord, QStringList &installAppInfoRes);
 
@@ -49,10 +61,17 @@ private:
     bool openDataBase();
     void closeDataBase();
 
+    QDBusInterface *m_interface = nullptr;
+
     AppInfoTable *q = nullptr;
-    QSqlDatabase *m_database = nullptr;
+    QSqlDatabase m_database;
     QString m_ConnectionName;
 
+public Q_SLOTS:
+    void sendAppDBItemsUpdate(QVector<AppInfoResult> results);
+    void sendAppDBItemsAdd(QVector<AppInfoResult> results);
+    void sendAppDBItemsDelete(QStringList desktopfps);
+
 };
 
 
diff --git a/libsearch/appdata/app-info-table.cpp b/libsearch/appdata/app-info-table.cpp
index 8201547..2717745 100644
--- a/libsearch/appdata/app-info-table.cpp
+++ b/libsearch/appdata/app-info-table.cpp
@@ -1,3 +1,6 @@
+#include "app-info-table.h"
+#include "app-info-table-private.h"
+
 #include <QDebug>
 #include <QtGlobal>
 #include <string>
@@ -11,13 +14,23 @@
 #include <QSqlError>
 #include <QApplication>
 #include <qt5xdg/XdgDesktopFile>
-#include "app-info-table.h"
-#include "app-info-table-private.h"
-#include "../ukui-search-app-data-service/app-db-common-defines.h"
 
 using namespace UkuiSearch;
-AppInfoTablePrivate::AppInfoTablePrivate(AppInfoTable *parent) : QObject(parent), q(parent), m_database(new QSqlDatabase)
+
+AppInfoTablePrivate::AppInfoTablePrivate(AppInfoTable *parent) : QObject(parent), q(parent), m_database(QSqlDatabase())
 {
+    m_interface = new QDBusInterface("com.ukui.search.appdb.service",
+                                     "/org/ukui/search/appDataBase",
+                                     "org.ukui.search.appdb");
+
+    if (!m_interface->isValid()) {
+        qCritical() << "Create privateDirWatcher Interface Failed Because: " << QDBusConnection::sessionBus().lastError();
+        return;
+    } else {
+        connect(m_interface, SIGNAL(appDBItemsAdd(QVector<AppInfoResult>)), this, SLOT(sendAppDBItemsAdd(QVector<AppInfoResult>)));
+        connect(m_interface, SIGNAL(appDBItemsUpdate(QVector<AppInfoResult>)), this, SLOT(sendAppDBItemsUpdate(QVector<AppInfoResult>)));
+        connect(m_interface, SIGNAL(appDBItemsDelete(QStringList)), this, SLOT(sendAppDBItemsDelete(QStringList)));
+    }
     while(1) {
         srand(QTime(0,0,0).secsTo(QTime::currentTime()));
         m_ConnectionName = QString::fromStdString(std::to_string(rand()));//随机生产链接
@@ -27,26 +40,26 @@ AppInfoTablePrivate::AppInfoTablePrivate(AppInfoTable *parent) : QObject(parent)
     qDebug() << "App info database currunt connection name:" << m_ConnectionName;
     if (!this->openDataBase()) {
         Q_EMIT q->DBOpenFailed();
-        qWarning() << "Fail to open App DataBase, because:" << m_database->lastError();
+        qWarning() << "Fail to open App DataBase, because:" << m_database.lastError();
     }
 }
 
 bool AppInfoTablePrivate::setAppFavoritesState(QString &desktopfp, size_t num)
 {
     bool res(true);
-    if (m_database->transaction()) {
-        QSqlQuery sql(*m_database);
+    if (m_database.transaction()) {
+        QSqlQuery sql(m_database);
         QString cmd = QString("UPDATE appInfo SET MODIFYED_TIME='%0', FAVORITES=%1 WHERE DESKTOP_FILE_PATH='%2'")
                 .arg(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"))
                 .arg(num)
                 .arg(desktopfp);
         if (!sql.exec(cmd)) {
-            qWarning() << "Set app favorites state failed!" << m_database->lastError();
+            qWarning() << "Set app favorites state failed!" << m_database.lastError();
             res = false;
         }
-        if (!m_database->commit()) {
+        if (!m_database.commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database->rollback();
+            m_database.rollback();
             res = false;
         }
     } else {
@@ -59,19 +72,19 @@ bool AppInfoTablePrivate::setAppFavoritesState(QString &desktopfp, size_t num)
 bool AppInfoTablePrivate::setAppTopState(QString &desktopfp, size_t num)
 {
     bool res(true);
-    if (m_database->transaction()) {
-        QSqlQuery sql(*m_database);
+    if (m_database.transaction()) {
+        QSqlQuery sql(m_database);
         QString cmd = QString("UPDATE appInfo SET MODIFYED_TIME='%0', TOP=%1 WHERE DESKTOP_FILE_PATH='%2'")
                 .arg(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"))
                 .arg(num)
                 .arg(desktopfp);
         if (!sql.exec(cmd)) {
-            qWarning() << "Set app favorites state failed!" << m_database->lastError();
+            qWarning() << "Set app favorites state failed!" << m_database.lastError();
             res = false;
         }
-        if (!m_database->commit()) {
+        if (!m_database.commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database->rollback();
+            m_database.rollback();
             res = false;
         }
     } else {
@@ -84,20 +97,20 @@ bool AppInfoTablePrivate::setAppTopState(QString &desktopfp, size_t num)
 bool AppInfoTablePrivate::setAppLaunchTimes(QString &desktopfp, size_t num)
 {
     bool res(true);
-    if (m_database->transaction()) {
-        QSqlQuery sql(*m_database);
+    if (m_database.transaction()) {
+        QSqlQuery sql(m_database);
         QString cmd = QString("UPDATE appInfo SET MODIFYED_TIME='%0', LAUNCH_TIMES=%1, LAUNCHED=%2 WHERE DESKTOP_FILE_PATH='%3'")
                 .arg(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"))
                 .arg(num)
                 .arg(1)
                 .arg(desktopfp);
         if (!sql.exec(cmd)) {
-            qWarning() << "Set app favorites state failed!" << m_database->lastError();
+            qWarning() << "Set app favorites state failed!" << m_database.lastError();
             res = false;
         }
-        if (!m_database->commit()) {
+        if (!m_database.commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database->rollback();
+            m_database.rollback();
             res = false;
         }
     } else {
@@ -110,8 +123,8 @@ bool AppInfoTablePrivate::setAppLaunchTimes(QString &desktopfp, size_t num)
 bool AppInfoTablePrivate::updateAppLaunchTimes(QString &desktopfp)
 {
     bool res(true);
-    if (m_database->transaction()) {
-        QSqlQuery sql(*m_database);
+    if (m_database.transaction()) {
+        QSqlQuery sql(m_database);
         QString cmd = QString("SELECT LAUNCH_TIMES FROM appInfo WHERE DESKTOP_FILE_PATH='%1'").arg(desktopfp);
         if (sql.exec(cmd)) {
             if (sql.next()) {
@@ -121,7 +134,7 @@ bool AppInfoTablePrivate::updateAppLaunchTimes(QString &desktopfp)
                         .arg(1)
                         .arg(desktopfp);
                 if (!sql.exec(cmd)) {
-                    qWarning() << "Set app favorites state failed!" << m_database->lastError();
+                    qWarning() << "Set app favorites state failed!" << m_database.lastError();
                     res = false;
                 }
             } else {
@@ -132,9 +145,9 @@ bool AppInfoTablePrivate::updateAppLaunchTimes(QString &desktopfp)
             qWarning() << "Failed to exec:" << cmd;
             res = false;
         }
-        if (!m_database->commit()) {
+        if (!m_database.commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database->rollback();
+            m_database.rollback();
             res = false;
         }
     } else {
@@ -147,19 +160,19 @@ bool AppInfoTablePrivate::updateAppLaunchTimes(QString &desktopfp)
 bool AppInfoTablePrivate::setAppLockState(QString &desktopfp, size_t num)
 {
     bool res(true);
-    if (m_database->transaction()) {
-        QSqlQuery sql(*m_database);
+    if (m_database.transaction()) {
+        QSqlQuery sql(m_database);
         QString cmd = QString("UPDATE appInfo SET MODIFYED_TIME='%0', LOCK=%1 WHERE DESKTOP_FILE_PATH='%2'")
                 .arg(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"))
                 .arg(num)
                 .arg(desktopfp);
         if (!sql.exec(cmd)) {
-            qWarning() << "Set app favorites state failed!" << m_database->lastError();
+            qWarning() << "Set app favorites state failed!" << m_database.lastError();
             res = false;
         }
-        if (!m_database->commit()) {
+        if (!m_database.commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database->rollback();
+            m_database.rollback();
             res = false;
         }
     } else {
@@ -169,38 +182,126 @@ bool AppInfoTablePrivate::setAppLockState(QString &desktopfp, size_t num)
     return res;
 }
 
+bool AppInfoTablePrivate::changeFavoriteAppPos(const QString &desktopfp, size_t pos)
+{
+    bool res(true);
+    if (m_database.transaction()) {
+        QSqlQuery sql(m_database);
+        QString cmd = QString("SELECT FAVORITES FROM appInfo WHERE DESKTOP_FILE_PATH = %0").arg(desktopfp);
+        //记录应用原位置
+        if (!sql.exec(cmd)) {
+            qWarning() << "Fail to change favorite-app pos, because: " << m_database.lastError() << " when exec :" << cmd;
+            res = false;
+        } else {
+            if (sql.next()) {
+                cmd = QString("UPDATE appInfo SET FAVORITES = FAVORITES + 1 WHRER FAVORITES > %1 AND FAVORITES < %2")
+                              .arg(sql.value(0).toUInt())
+                              .arg(pos);
+            } else {
+                qWarning() << "Fail to change favorite-app pos when exec next, because: " << m_database.lastError();
+            }
+        }
+        //更新范围内的应用的位置(原位置和新位置之间）
+        if (!sql.exec(cmd)) {
+            qWarning() << "Fail to change favorite-app pos, because: " << m_database.lastError() << " when exec :" << cmd;
+            res = false;
+        } else {
+            cmd = QString("UPDATE appInfo SET FAVORITES = %1 WHERE DESKTOP_FILE_PATH = %2")
+                          .arg(pos)
+                          .arg(desktopfp);
+        }
+        //更新应用位置
+        if (!sql.exec(cmd)) {
+            qWarning() << "Fail to change favorite-app pos, because: " << m_database.lastError() << " when exec :" << cmd;
+            res = false;
+        }
+
+        if (!m_database.commit()) {
+            qWarning() << "Failed to commit when exec: " << cmd;
+            m_database.rollback();
+            res = false;
+        }
+
+    } else {
+        qWarning() << "Failed to start transaction mode!!!";
+        res = false;
+    }
+
+    return res;
+}
+
+bool AppInfoTablePrivate::changeTopAppPos(const QString &desktopfp, size_t pos)
+{
+    bool res(true);
+    if (m_database.transaction()) {
+        QSqlQuery sql(m_database);
+        QString cmd = QString("SELECT TOP FROM appInfo WHERE DESKTOP_FILE_PATH = %0").arg(desktopfp);
+        //记录应用原位置
+        if (!sql.exec(cmd)) {
+            qWarning() << "Fail to change top-app pos, because: " << m_database.lastError() << " when exec :" << cmd;
+            res = false;
+        } else {
+            if (sql.next()) {
+                cmd = QString("UPDATE appInfo SET TOP = TOP + 1 WHRER TOP > %1 AND TOP < %2")
+                              .arg(sql.value(0).toUInt())
+                              .arg(pos);
+            } else {
+                qWarning() << "Fail to change top-app pos when exec next, because: " << m_database.lastError();
+            }
+        }
+        //更新范围内的应用的位置(原位置和新位置之间）
+        if (!sql.exec(cmd)) {
+            qWarning() << "Fail to change top-app pos, because: " << m_database.lastError() << " when exec :" << cmd;
+            res = false;
+        } else {
+            cmd = QString("UPDATE appInfo SET TOP = %1 WHERE DESKTOP_FILE_PATH = %2")
+                          .arg(pos)
+                          .arg(desktopfp);
+        }
+        //更新应用位置
+        if (!sql.exec(cmd)) {
+            qWarning() << "Fail to change top-app pos, because: " << m_database.lastError() << " when exec :" << cmd;
+            res = false;
+        }
+
+        if (!m_database.commit()) {
+            qWarning() << "Failed to commit when exec: " << cmd;
+            m_database.rollback();
+            res = false;
+        }
+
+    } else {
+        qWarning() << "Failed to start transaction mode!!!";
+        res = false;
+    }
+
+    return res;
+}
+
 bool AppInfoTablePrivate::getAllAppDesktopList(QStringList &list)
 {
     bool res(true);
-    if (m_database->transaction()) {
-        QSqlQuery sql(*m_database);
-        QString cmd = QString("SELECT DESKTOP_FILE_PATH FROM appInfo");
-        if (sql.exec(cmd)) {
-            while (sql.next()) {
-                list.append(sql.value(0).toString());
-            }
-        } else {
-            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
-            res = false;
-        }
-        if (!m_database->commit()) {
-            qWarning() << "Failed to commit !" << cmd;
-            m_database->rollback();
-            res = false;
+    QSqlQuery sql(m_database);
+    QString cmd = QString("SELECT DESKTOP_FILE_PATH FROM appInfo");
+
+    if (sql.exec(cmd)) {
+        while (sql.next()) {
+            list.append(sql.value(0).toString());
         }
     } else {
-        qWarning() << "Failed to start transaction mode!!!";
+        qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
         res = false;
     }
+
     return res;
 }
 
 bool AppInfoTablePrivate::getFavoritesAppList(QStringList &list)
 {
     bool res(true);
-    if (m_database->transaction()) {
-        QSqlQuery sql(*m_database);
-        QSqlQuery sqlque(*m_database);
+    if (m_database.transaction()) {
+        QSqlQuery sql(m_database);
+        QSqlQuery sqlque(m_database);
         QString cmd = QString("SELECT DESKTOP_FILE_PATH FROM appInfo WHERE FAVORITES!=0 ORDER BY FAVORITES");
         int count = 0;
         if (sql.exec(cmd)) {
@@ -210,18 +311,18 @@ bool AppInfoTablePrivate::getFavoritesAppList(QStringList &list)
                         .arg(++count)
                         .arg(sql.value(0).toString());
                 if (!sqlque.exec(cmd)) {
-                    qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+                    qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
                     res = false;
                     break;
                 }
             }
         } else {
-            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
             res = false;
         }
-        if (!m_database->commit()) {
+        if (!m_database.commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database->rollback();
+            m_database.rollback();
             res = false;
         }
     } else {
@@ -234,9 +335,9 @@ bool AppInfoTablePrivate::getFavoritesAppList(QStringList &list)
 bool AppInfoTablePrivate::getTopAppList(QStringList &list)
 {
     bool res(true);
-    if (m_database->transaction()) {
-        QSqlQuery sql(*m_database);
-        QSqlQuery sqlque(*m_database);
+    if (m_database.transaction()) {
+        QSqlQuery sql(m_database);
+        QSqlQuery sqlque(m_database);
         QString cmd = QString("SELECT DESKTOP_FILE_PATH FROM appInfo WHERE TOP!=0 ORDER BY TOP");
         int count = 0;
         if (sql.exec(cmd)) {
@@ -246,18 +347,18 @@ bool AppInfoTablePrivate::getTopAppList(QStringList &list)
                         .arg(++count)
                         .arg(sql.value(0).toString());
                 if (!sqlque.exec(cmd)) {
-                    qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+                    qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
                     res = false;
                     break;
                 }
             }
         } else {
-            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
             res = false;
         }
-        if (!m_database->commit()) {
+        if (!m_database.commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database->rollback();
+            m_database.rollback();
             res = false;
         }
     } else {
@@ -270,9 +371,9 @@ bool AppInfoTablePrivate::getTopAppList(QStringList &list)
 bool AppInfoTablePrivate::getLaunchTimesAppList(QStringList &list)
 {
     bool res(true);
-    if (m_database->transaction()) {
-        QSqlQuery sql(*m_database);
-        QSqlQuery sqlque(*m_database);
+    if (m_database.transaction()) {
+        QSqlQuery sql(m_database);
+        QSqlQuery sqlque(m_database);
         QString cmd = QString("SELECT DESKTOP_FILE_PATH FROM appInfo ORDER BY LAUNCH_TIMES");
         int count = 0;
         if (sql.exec(cmd)) {
@@ -282,18 +383,18 @@ bool AppInfoTablePrivate::getLaunchTimesAppList(QStringList &list)
                         .arg(++count)
                         .arg(sql.value(0).toString());
                 if (!sqlque.exec(cmd)) {
-                    qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+                    qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
                     res = false;
                     break;
                 }
             }
         } else {
-            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
             res = false;
         }
-        if (!m_database->commit()) {
+        if (!m_database.commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database->rollback();
+            m_database.rollback();
             res = false;
         }
     } else {
@@ -306,24 +407,24 @@ bool AppInfoTablePrivate::getLaunchTimesAppList(QStringList &list)
 bool AppInfoTablePrivate::getAppCategory(QString &desktopfp, QString &category)
 {
     bool res(true);
-    if (m_database->transaction()) {
-        QSqlQuery sql(*m_database);
+    if (m_database.transaction()) {
+        QSqlQuery sql(m_database);
         QString cmd = QString("SELECT CATEGORY FROM appInfo WHERE DESKTOP_FILE_PATH='%0'")
                 .arg(desktopfp);
         if (sql.exec(cmd)) {
             if (sql.next()) {
                 category = sql.value(0).toString();
             } else {
-                qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+                qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
                 res = false;
             }
         } else {
-            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
             res = false;
         }
-        if (!m_database->commit()) {
+        if (!m_database.commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database->rollback();
+            m_database.rollback();
             res = false;
         }
     } else {
@@ -333,15 +434,15 @@ bool AppInfoTablePrivate::getAppCategory(QString &desktopfp, QString &category)
     return res;
 }
 
-bool AppInfoTablePrivate::getAppInfoResults(QVector<AppInfoTable::AppInfoResult> &appInfoResults)
+bool AppInfoTablePrivate::getAppInfoResults(QVector<AppInfoResult> &appInfoResults)
 {
     bool res(true);
-    if (m_database->transaction()) {
-        QSqlQuery sql(*m_database);
-        QString cmd = QString("SELECT DESKTOP_FILE_PATH,LOCAL_NAME,ICON,CATEGORY,TOP,FAVORITES,LAUNCH_TIMES,LOCK FROM appInfo");
+    if (m_database.transaction()) {
+        QSqlQuery sql(m_database);
+        QString cmd = QString("SELECT DESKTOP_FILE_PATH,LOCAL_NAME,ICON,CATEGORY,TOP,FAVORITES,LAUNCH_TIMES,LOCK,FIRST_LETTER_ALL FROM appInfo");
         if (sql.exec(cmd)) {
             while (sql.next()) {
-                AppInfoTable::AppInfoResult result;
+                AppInfoResult result;
                 result.desktopPath = sql.value(0).toString();
                 result.appLocalName = sql.value(1).toString();
                 result.iconName = sql.value(2).toString();
@@ -350,15 +451,16 @@ bool AppInfoTablePrivate::getAppInfoResults(QVector<AppInfoTable::AppInfoResult>
                 result.favorate = sql.value(5).toInt();
                 result.launchTimes = sql.value(6).toInt();
                 result.lock = sql.value(7).toInt();
+                result.firstLetter = sql.value(8).toString();
                 appInfoResults.append(std::move(result));
             }
         } else {
-            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
             res = false;
         }
-        if (!m_database->commit()) {
+        if (!m_database.commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database->rollback();
+            m_database.rollback();
             res = false;
         }
     } else {
@@ -371,24 +473,24 @@ bool AppInfoTablePrivate::getAppInfoResults(QVector<AppInfoTable::AppInfoResult>
 bool AppInfoTablePrivate::getAppLockState(QString &desktopfp, size_t &num)
 {
     bool res(true);
-    if (m_database->transaction()) {
-        QSqlQuery sql(*m_database);
+    if (m_database.transaction()) {
+        QSqlQuery sql(m_database);
         QString cmd = QString("SELECT LOCK FROM appInfo WHERE DESKTOP_FILE_PATH='%0'")
                 .arg(desktopfp);
         if (sql.exec(cmd)) {
             if (sql.next()) {
                 num = sql.value(0).toInt();
             } else {
-                qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+                qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
                 res = false;
             }
         } else {
-            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
             res = false;
         }
-        if (!m_database->commit()) {
+        if (!m_database.commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database->rollback();
+            m_database.rollback();
             res = false;
         }
     } else {
@@ -401,24 +503,24 @@ bool AppInfoTablePrivate::getAppLockState(QString &desktopfp, size_t &num)
 bool AppInfoTablePrivate::getAppTopState(QString &desktopfp, size_t &num)
 {
     bool res(true);
-    if (m_database->transaction()) {
-        QSqlQuery sql(*m_database);
+    if (m_database.transaction()) {
+        QSqlQuery sql(m_database);
         QString cmd = QString("SELECT TOP FROM appInfo WHERE DESKTOP_FILE_PATH='%0'")
                 .arg(desktopfp);
         if (sql.exec(cmd)) {
             if (sql.next()) {
                 num = sql.value(0).toInt();
             } else {
-                qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+                qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
                 res = false;
             }
         } else {
-            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
             res = false;
         }
-        if (!m_database->commit()) {
+        if (!m_database.commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database->rollback();
+            m_database.rollback();
             res = false;
         }
     } else {
@@ -431,24 +533,24 @@ bool AppInfoTablePrivate::getAppTopState(QString &desktopfp, size_t &num)
 bool AppInfoTablePrivate::getAppLaunchedState(QString &desktopfp, size_t &num)
 {
     bool res(true);
-    if (m_database->transaction()) {
-        QSqlQuery sql(*m_database);
+    if (m_database.transaction()) {
+        QSqlQuery sql(m_database);
         QString cmd = QString("SELECT LAUNCHED FROM appInfo WHERE DESKTOP_FILE_PATH='%0'")
                 .arg(desktopfp);
         if (sql.exec(cmd)) {
             if (sql.next()) {
                 num = sql.value(0).toInt();
             } else {
-                qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+                qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
                 res = false;
             }
         } else {
-            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
             res = false;
         }
-        if (!m_database->commit()) {
+        if (!m_database.commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database->rollback();
+            m_database.rollback();
             res = false;
         }
     } else {
@@ -461,24 +563,24 @@ bool AppInfoTablePrivate::getAppLaunchedState(QString &desktopfp, size_t &num)
 bool AppInfoTablePrivate::getAppFavoriteState(QString &desktopfp, size_t &num)
 {
     bool res(true);
-    if (m_database->transaction()) {
-        QSqlQuery sql(*m_database);
+    if (m_database.transaction()) {
+        QSqlQuery sql(m_database);
         QString cmd = QString("SELECT FAVORITES FROM appInfo WHERE DESKTOP_FILE_PATH='%0'")
                 .arg(desktopfp);
         if (sql.exec(cmd)) {
             if (sql.next()) {
                 num = sql.value(0).toInt();
             } else {
-                qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+                qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
                 res = false;
             }
         } else {
-            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
             res = false;
         }
-        if (!m_database->commit()) {
+        if (!m_database.commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database->rollback();
+            m_database.rollback();
             res = false;
         }
     } else {
@@ -534,8 +636,8 @@ bool AppInfoTablePrivate::addAppShortcut2Panel(QString &desktopfp)
 bool AppInfoTablePrivate::searchInstallApp(QString &keyWord, QStringList &installAppInfoRes)
 {
     bool res(true);
-    if (m_database->transaction()) {
-        QSqlQuery sql(*m_database);
+    if (m_database.transaction()) {
+        QSqlQuery sql(m_database);
         QString cmd;
         if (keyWord.size() < 2) {
             cmd = QString("SELECT DESKTOP_FILE_PATH,LOCAL_NAME,ICON FROM appInfo WHERE LOCAL_NAME OR NAME_EN OR NAME_ZH OR FIRST_LETTER_OF_PINYIN LIKE '%%0%' ORDER BY FAVORITES DESC")
@@ -550,12 +652,12 @@ bool AppInfoTablePrivate::searchInstallApp(QString &keyWord, QStringList &instal
                 installAppInfoRes << sql.value(0).toString() << sql.value(1).toString() << sql.value(2).toString();
             }
         } else {
-            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
             res = false;
         }
-        if (!m_database->commit()) {
+        if (!m_database.commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database->rollback();
+            m_database.rollback();
             res = false;
         }
     } else {
@@ -568,8 +670,8 @@ bool AppInfoTablePrivate::searchInstallApp(QString &keyWord, QStringList &instal
 bool AppInfoTablePrivate::searchInstallApp(QStringList &keyWord, QStringList &installAppInfoRes)
 {
     bool res(true);
-    if (m_database->transaction() or keyWord.size() != 0) {
-        QSqlQuery sql(*m_database);
+    if (m_database.transaction() or keyWord.size() != 0) {
+        QSqlQuery sql(m_database);
         QString cmd;
         if (keyWord.at(0).size() < 2) {
             cmd = QString("SELECT DESKTOP_FILE_PATH,LOCAL_NAME,ICON,NAME_EN,NAME_ZH,FIRST_LETTER_OF_PINYIN FROM appInfo"
@@ -595,12 +697,12 @@ bool AppInfoTablePrivate::searchInstallApp(QStringList &keyWord, QStringList &in
                 installAppInfoRes << sql.value(0).toString() << sql.value(1).toString() << sql.value(2).toString();
             }
         } else {
-            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
+            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
             res = false;
         }
-        if (!m_database->commit()) {
+        if (!m_database.commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database->rollback();
+            m_database.rollback();
             res = false;
         }
     } else {
@@ -648,7 +750,7 @@ bool AppInfoTablePrivate::uninstallApp(QString &desktopfp)
 
 QString AppInfoTablePrivate::lastError() const
 {
-    return m_database->lastError().text();
+    return m_database.lastError().text();
 }
 
 AppInfoTablePrivate::~AppInfoTablePrivate()
@@ -658,9 +760,9 @@ AppInfoTablePrivate::~AppInfoTablePrivate()
 
 bool AppInfoTablePrivate::initDateBaseConnection()
 {
-    m_database->setDatabaseName(APP_DATABASE_PATH + APP_DATABASE_NAME);
-    if(!m_database->open()) {
-        qWarning() << m_database->lastError();
+    m_database.setDatabaseName(APP_DATABASE_PATH + APP_DATABASE_NAME);
+    if(!m_database.open()) {
+        qWarning() << m_database.lastError();
         return false;
 //        QApplication::quit();
     }
@@ -669,10 +771,10 @@ bool AppInfoTablePrivate::initDateBaseConnection()
 
 bool AppInfoTablePrivate::openDataBase()
 {
-    *m_database = QSqlDatabase::addDatabase("QSQLITE", m_ConnectionName);
-    m_database->setDatabaseName(APP_DATABASE_PATH + APP_DATABASE_NAME);
+    m_database = QSqlDatabase::addDatabase("QSQLITE", m_ConnectionName);
+    m_database.setDatabaseName(APP_DATABASE_PATH + APP_DATABASE_NAME);
 
-    if(!m_database->open()) {
+    if(!m_database.open()) {
         return false;
     }
     return true;
@@ -680,11 +782,26 @@ bool AppInfoTablePrivate::openDataBase()
 
 void AppInfoTablePrivate::closeDataBase()
 {
-    m_database->close();
-    delete m_database;
+    m_database.close();
+//    delete m_database;
     QSqlDatabase::removeDatabase(m_ConnectionName);
 }
 
+void AppInfoTablePrivate::sendAppDBItemsUpdate(QVector<AppInfoResult> results)
+{
+    Q_EMIT q->appDBItems2BUpdate(results);
+}
+
+void AppInfoTablePrivate::sendAppDBItemsAdd(QVector<AppInfoResult> results)
+{
+    Q_EMIT q->appDBItems2BAdd(results);
+}
+
+void AppInfoTablePrivate::sendAppDBItemsDelete(QStringList desktopfps)
+{
+    Q_EMIT q->appDBItems2BDelete(desktopfps);
+}
+
 AppInfoTable::AppInfoTable(QObject *parent) : QObject(parent), d(new AppInfoTablePrivate(this))
 {
 }
@@ -739,7 +856,17 @@ bool AppInfoTable::getAppCategory(QString &desktopfp, QString &category)
     return d->getAppCategory(desktopfp, category);
 }
 
-bool AppInfoTable::getAppInfoResults(QVector<AppInfoTable::AppInfoResult> &appInfoResults)
+bool AppInfoTable::changeFavoriteAppPos(const QString &desktopfp, size_t pos)
+{
+    return d->changeFavoriteAppPos(desktopfp, pos);
+}
+
+bool AppInfoTable::changeTopAppPos(const QString &desktopfp, size_t pos)
+{
+    return d->changeTopAppPos(desktopfp, pos);
+}
+
+bool AppInfoTable::getAppInfoResults(QVector<AppInfoResult> &appInfoResults)
 {
     return d->getAppInfoResults(appInfoResults);
 }
diff --git a/libsearch/appdata/app-info-table.h b/libsearch/appdata/app-info-table.h
index 04cf34e..5ff4e5a 100644
--- a/libsearch/appdata/app-info-table.h
+++ b/libsearch/appdata/app-info-table.h
@@ -2,54 +2,89 @@
 #define APPINFOTABLE_H
 
 #include <QObject>
+#include "app-db-common.h"
+
 namespace UkuiSearch {
+
 class AppInfoTablePrivate;
 class AppInfoTable : public QObject
 {
     Q_OBJECT
-
-public:
-    typedef struct appInfoResult
-    {
-        appInfoResult() {
-            top = 0;
-            favorate = 0;
-            launchTimes = 0;
-            lock = 0;
-        }
-
-        QString desktopPath;
-        QString iconName;
-        QString appLocalName;
-        QString firstLetter;
-        QString category;
-        size_t top;
-        size_t favorate;
-        size_t launchTimes;
-        size_t lock;
-
-    } AppInfoResult;
-
 public:
     explicit AppInfoTable(QObject *parent = nullptr);
     AppInfoTable(AppInfoTable &) = delete;
     AppInfoTable &operator =(const AppInfoTable &) = delete;
 
+    /**
+     * @brief AppInfoTable::setAppFavoritesState
+     * set the favorites state of the app
+     * @param desktopfp: the desktop file path of app
+     * @param num: the favorites app's order(from 1)
+     * @return bool: true if success, else false
+     */
     bool setAppFavoritesState(QString &desktopfp, size_t num);
+
+    /**
+     * @brief AppInfoTable::setAppTopState
+     * set the top state of the app
+     * @param desktopfp: the desktop file path of app
+     * @param num: the top app's order(from 1)
+     * @return bool: true if success, else false
+     */
     bool setAppTopState(QString &desktopfp, size_t num);
 
+    /**
+     * @brief AppInfoTable::getAllAppDesktopList
+     * get the desktop file paths of all apps
+     * @param list: a stringlist include all paths
+     * @return bool: true if success, else false
+     */
     bool getAllAppDesktopList(QStringList &list);
+
+    /**
+     * @brief AppInfoTable::getFavoritesAppList
+     * get all favorites apps
+     * @param list: a stringlist include all apps' paths
+     * @return bool: true if success, else false
+     */
     bool getFavoritesAppList(QStringList &list);
+
+    /**
+     * @brief AppInfoTable::getTopAppList
+     * get all top apps
+     * @param list: a stringlist include all apps' paths
+     * @return bool: true if success, else false
+     */
     bool getTopAppList(QStringList &list);
+
     bool getLaunchTimesAppList(QStringList &list);
     bool getAppCategory(QString &desktopfp, QString &category);
 
     /**
-     * @brief getAppInfoResults
-     * @param appInfoResults
-     * @return
+     * @brief AppInfoTable::changeFavoriteAppPos
+     * change the position of the app which is one of the Favorites Apps
+     * @param desktopfp: desktop file path of app
+     * @param pos: the position which the app will be changed into
+     * @return bool: true if success, else false
      */
-    bool getAppInfoResults(QVector<AppInfoTable::AppInfoResult> &appInfoResults);
+    bool changeFavoriteAppPos(const QString &desktopfp, size_t pos);
+
+    /**
+     * @brief AppInfoTable::changeTopAppPos
+     * hange the position of the app which is one of the Top Apps
+     * @param desktopfp: desktop file path of app
+     * @param pos: the position which the app will be changed into
+     * @return bool: true if success, else false
+     */
+    bool changeTopAppPos(const QString &desktopfp, size_t pos);
+
+    /**
+     * @brief AppInfoTable::getAppInfoResults
+     * Get all App infos by passing AppInforesult Vector.
+     * @param AppInfoResults: a struct which includes all infos of each application
+     * @return bool: true if success, else false
+     */
+    bool getAppInfoResults(QVector<AppInfoResult> &appInfoResults);
 
     bool getAppLockState(QString &desktopfp, size_t &num);
     bool getAppTopState(QString &desktopfp, size_t &num);
@@ -65,8 +100,9 @@ public:
     bool uninstallApp(QString &desktopfp);
 
     /**
-     * @brief lastError
-     * @return
+     * @brief AppInfoTable::lastError
+     * the last error of the database
+     * @return QString: the text of the last error
      */
     QString lastError(void) const;
 
@@ -76,9 +112,12 @@ private:
     bool updateAppLaunchTimes(QString &desktopfp);
 
     AppInfoTablePrivate *d;
+
 Q_SIGNALS:
     void DBOpenFailed();
-
+    void appDBItems2BUpdate(QVector<AppInfoResult>);
+    void appDBItems2BAdd(QVector<AppInfoResult>);
+    void appDBItems2BDelete(QStringList);
 };
 }
 
diff --git a/libsearch/libsearch.pro b/libsearch/libsearch.pro
index 79da936..18b3069 100644
--- a/libsearch/libsearch.pro
+++ b/libsearch/libsearch.pro
@@ -50,6 +50,7 @@ SOURCES += \
     libsearch.cpp
 
 HEADERS += \
+    app-db-common.h \
     common.h \
     file-utils.h \
     global-settings.h \
diff --git a/ukui-search-app-data-service/app-db-common-defines.h b/ukui-search-app-data-service/app-db-common-defines.h
deleted file mode 100644
index e3c1225..0000000
--- a/ukui-search-app-data-service/app-db-common-defines.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#ifndef APPDBCOMMONDEFINES_H
-#define APPDBCOMMONDEFINES_H
-#include <QDir>
-
-namespace UkuiSearch {
-
-#define APP_DATABASE_PATH QDir::homePath()+"/.config/org.ukui/ukui-search/appdata/"
-#define APP_DATABASE_NAME "app-info.db"
-
-}
-#endif // APPDBCOMMONDEFINES_H
diff --git a/ukui-search-app-data-service/app-db-manager.cpp b/ukui-search-app-data-service/app-db-manager.cpp
index a4b95db..1c2ddcf 100644
--- a/ukui-search-app-data-service/app-db-manager.cpp
+++ b/ukui-search-app-data-service/app-db-manager.cpp
@@ -1,10 +1,11 @@
+#include "app-db-manager.h"
+#include "file-utils.h"
+#include "convert-winid-to-desktop.h"
+
 #include <qt5xdg/XdgDesktopFile>
 #include <QMutexLocker>
 #include <QCryptographicHash>
 #include <QFile>
-#include "app-db-manager.h"
-#include "file-utils.h"
-#include "convert-winid-to-desktop.h"
 
 #define GENERAL_APP_DESKTOP_PATH "/usr/share/applications/"
 #define ANDROID_APP_DESKTOP_PATH QDir::homePath() + "/.local/share/applications/"
@@ -71,6 +72,8 @@ AppDBManager::AppDBManager(QObject *parent) : QObject(parent), m_database(QSqlDa
                 if (!m_database.commit()) {
                     qWarning() << "Failed to commit !";
                     m_database.rollback();
+                } else {
+                    Q_EMIT this->finishHandleAppDB();
                 }
             } else {
                 qWarning() << "Failed to start transaction mode!!!";
@@ -111,7 +114,7 @@ void AppDBManager::buildAppInfoDB()
                          .arg("NAME_ZH TEXT")//应用中文名称
                          .arg("PINYIN_NAME TEXT")//中文拼音
                          .arg("FIRST_LETTER_OF_PINYIN TEXT")//中文拼音首字母
-                         .arg("FIRST_LETTER_ALL")//中英文首字母（只包含一个，目前方案取拼音首字母的第一项，由于模糊拼音算法可能出问题）
+                         .arg("FIRST_LETTER_ALL")//拼音和英文全拼
                          .arg("ICON TEXT")//图标名称（或路径）
                          .arg("TYPE TEXT")//应用类型
                          .arg("CATEGORY TEXT")//应用分类
@@ -406,6 +409,10 @@ bool AppDBManager::updateLocaleData2DB(QString desktopPath)
         res = false;
     }
     if (res) {
+        AppInfoResult result;
+        result.appLocalName = localName;
+        result.firstLetter = firstLetter2All;
+        Q_EMIT this->appDBItemUpdate(result);
         qDebug() << "Already to update the locale app-data of " << desktopPath;
     } else {
         qDebug() << "Fail to update the locale app-data of " << desktopPath;
@@ -421,6 +428,8 @@ void AppDBManager::initDataBase()
         if (!m_database.commit()) {
             qWarning() << "Failed to commit !";
             m_database.rollback();
+        } else {
+            Q_EMIT this->finishHandleAppDB();
         }
     } else {
         qWarning() << "Failed to start transaction mode!!!";
@@ -482,11 +491,11 @@ bool AppDBManager::addAppDesktopFile2DB(QString &desktopfd)
     desktopfile.load(desktopfd);
     QString hanzi, pinyin, firstLetterOfPinyin;
     QString localName = desktopfile.localizedValue("Name", "NULL").toString();
-    QString firstLtter2All = localName;
+    QString firstLetter2All = localName;
     bool isHanzi = true;
 
     if (localName.contains(QRegExp("[\\x4e00-\\x9fa5]+"))) {
-        firstLtter2All = FileUtils::findMultiToneWords(localName).at(0);
+        firstLetter2All = FileUtils::findMultiToneWords(localName).at(0);
     }
 
     if (desktopfile.contains("Name[zh_CN]")) {
@@ -524,7 +533,7 @@ bool AppDBManager::addAppDesktopFile2DB(QString &desktopfd)
             .arg(hanzi)
             .arg(pinyin)
             .arg(firstLetterOfPinyin)
-            .arg(firstLtter2All)
+            .arg(firstLetter2All)
             .arg(desktopfile.value("Icon").toString())
             .arg(desktopfile.value("Type").toString())
             .arg(desktopfile.value("Categories").toString())
@@ -541,6 +550,13 @@ bool AppDBManager::addAppDesktopFile2DB(QString &desktopfd)
         res = false;
     }
     if (res) {
+        AppInfoResult result;
+        result.desktopPath = desktopfd;
+        result.iconName = desktopfile.value("Icon").toString();
+        result.appLocalName = localName;
+        result.firstLetter = firstLetter2All;
+        result.category = desktopfile.value("Categories").toString();
+        Q_EMIT this->appDBItemAdd(result);
         qDebug() << "app database add " << desktopfd << "success!";
     } else {
         qDebug() << "app database add " << desktopfd << "failed!";
@@ -558,6 +574,7 @@ bool AppDBManager::deleteAppDesktopFile2DB(const QString &desktopfd)
         res = false;
     }
     if (res) {
+        Q_EMIT this->appDBItemDelete(desktopfd);
         qDebug() << "app database delete " << desktopfd << "success!";
     } else {
         qDebug() << "app database delete " << desktopfd << "failed!";
@@ -612,7 +629,7 @@ bool AppDBManager::updateAppDesktopFile2DB(QString &desktopfd)
                           "NAME_ZH='%3'"
                           ",PINYIN_NAME='%4',"
                           "FIRST_LETTER_OF_PINYIN='%5',"
-                          "FIRST_LETTER_ALL='%6'"
+                          "FIRST_LETTER_ALL='%6',"
                           "ICON='%7',"
                           "TYPE='%8',"
                           "CATEGORY='%9',"
@@ -639,6 +656,13 @@ bool AppDBManager::updateAppDesktopFile2DB(QString &desktopfd)
         res = false;
     }
     if (res) {
+        AppInfoResult result;
+        result.desktopPath = desktopfd;
+        result.iconName = desktopfile.value("Icon").toString();
+        result.appLocalName = localName;
+        result.firstLetter = firstLetter2All;
+        result.category = desktopfile.value("Categories").toString();
+        Q_EMIT this->appDBItemUpdate(result);
         qDebug() << "app database update " << desktopfd << "success!";
     } else {
         qDebug() << "app database update " << desktopfd << "failed!";
@@ -654,14 +678,19 @@ bool AppDBManager::updateAppLaunchTimes(QString &desktopfp)
         QString cmd = QString("SELECT LAUNCH_TIMES FROM appInfo WHERE DESKTOP_FILE_PATH='%1'").arg(desktopfp);
         if (sql.exec(cmd)) {
             if (sql.next()) {
+                int launchTimes = sql.value(0).toInt() + 1;
                 cmd = QString("UPDATE appInfo SET MODIFYED_TIME='%0', LAUNCH_TIMES=%1, LAUNCHED=%2 WHERE DESKTOP_FILE_PATH='%3'")
                         .arg(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"))
-                        .arg(sql.value(0).toInt() + 1)
+                        .arg(launchTimes)
                         .arg(1)
                         .arg(desktopfp);
                 if (!sql.exec(cmd)) {
                     qWarning() << "Set app favorites state failed!" << m_database.lastError();
                     res = false;
+                } else {
+                    AppInfoResult result;
+                    result.launchTimes = launchTimes;
+                    Q_EMIT this->appDBItemUpdate(result);
                 }
             } else {
                 qWarning() << "Failed to exec next!" << cmd;
@@ -675,6 +704,8 @@ bool AppDBManager::updateAppLaunchTimes(QString &desktopfp)
             qWarning() << "Failed to commit !" << cmd;
             m_database.rollback();
             res = false;
+        } else {
+            Q_EMIT this->finishHandleAppDB();
         }
     } else {
         qWarning() << "Failed to start transaction mode!!!";
diff --git a/ukui-search-app-data-service/app-db-manager.h b/ukui-search-app-data-service/app-db-manager.h
index 604c81c..5bd0592 100644
--- a/ukui-search-app-data-service/app-db-manager.h
+++ b/ukui-search-app-data-service/app-db-manager.h
@@ -1,6 +1,8 @@
 #ifndef APPDBMANAGER_H
 #define APPDBMANAGER_H
 
+#include "app-db-common.h"
+
 #include <QDir>
 #include <QObject>
 #include <QSqlDatabase>
@@ -12,7 +14,6 @@
 #include <QFileSystemWatcher>
 #include <QMutex>
 #include <QSettings>
-#include "app-db-common-defines.h"
 
 #define CONNECTION_NAME QLatin1String("ukss-appdb-connection")
 
@@ -130,7 +131,11 @@ private:
         //原本额外排除的目录，不知道额外的原因，有可能之后有问题--bjj20220621
         "/usr/share/applications/screensavers"
     };
-
+Q_SIGNALS:
+    void appDBItemUpdate(const AppInfoResult&);
+    void appDBItemAdd(const AppInfoResult&);
+    void appDBItemDelete(const QString&);
+    void finishHandleAppDB();
 };
 }
 
diff --git a/ukui-search-app-data-service/signal-transformer.cpp b/ukui-search-app-data-service/signal-transformer.cpp
new file mode 100644
index 0000000..6cc081e
--- /dev/null
+++ b/ukui-search-app-data-service/signal-transformer.cpp
@@ -0,0 +1,47 @@
+#include "signal-transformer.h"
+
+QMutex SignalTransformer::s_mutex;
+
+SignalTransformer *SignalTransformer::getTransformer()
+{
+    static SignalTransformer *instance = new SignalTransformer();
+    return instance;
+}
+
+void SignalTransformer::handleItemInsert(const AppInfoResult &item)
+{
+    QMutexLocker locker(&s_mutex);
+    m_items2BInsert.append(item);
+}
+
+void SignalTransformer::handleItemUpdate(const AppInfoResult &item)
+{
+    QMutexLocker locker(&s_mutex);
+    m_items2BUpdate.append(item);
+}
+
+void SignalTransformer::handleItemDelete(const QString &desktopfp)
+{
+    QMutexLocker locker(&s_mutex);
+    m_items2BDelete.append(desktopfp);
+}
+
+void SignalTransformer::handleSignalTransform()
+{
+    QMutexLocker locker(&s_mutex);
+    Q_EMIT this->appDBItemsAdd(m_items2BInsert);
+    Q_EMIT this->appDBItemsUpdate(m_items2BUpdate);
+    Q_EMIT this->appDBItemsDelete(m_items2BDelete);
+    m_items2BInsert.clear();
+    m_items2BUpdate.clear();
+    m_items2BDelete.clear();
+}
+
+SignalTransformer::SignalTransformer(QObject *parent) : QObject(parent)
+{
+    connect(AppDBManager::getInstance(), &AppDBManager::appDBItemAdd, this, &SignalTransformer::handleItemInsert);
+    connect(AppDBManager::getInstance(), &AppDBManager::appDBItemUpdate, this, &SignalTransformer::handleItemUpdate);
+    connect(AppDBManager::getInstance(), &AppDBManager::appDBItemDelete, this, &SignalTransformer::handleItemDelete);
+    connect(AppDBManager::getInstance(), &AppDBManager::finishHandleAppDB, this, &SignalTransformer::handleSignalTransform);
+}
+
diff --git a/ukui-search-app-data-service/signal-transformer.h b/ukui-search-app-data-service/signal-transformer.h
new file mode 100644
index 0000000..4f2d4fa
--- /dev/null
+++ b/ukui-search-app-data-service/signal-transformer.h
@@ -0,0 +1,43 @@
+#ifndef SIGNALTRANSFORMER_H
+#define SIGNALTRANSFORMER_H
+
+#include <QObject>
+#include <QDBusInterface>
+#include <QMutexLocker>
+#include "app-db-manager.h"
+
+using namespace UkuiSearch;
+
+class SignalTransformer : public QObject
+{
+    Q_CLASSINFO("D-Bus Interface","org.ukui.search.appdb")
+
+    Q_OBJECT
+
+public:
+    static SignalTransformer *getTransformer();
+
+    static QMutex s_mutex;
+
+public Q_SLOTS:
+    void handleItemInsert(const AppInfoResult &item);
+    void handleItemUpdate(const AppInfoResult &item);
+    void handleItemDelete(const QString &desktopfp);
+    void handleSignalTransform();
+
+private:
+    SignalTransformer(QObject *parent = nullptr);
+    SignalTransformer(const SignalTransformer &) = delete;
+    SignalTransformer& operator = (const SignalTransformer&) = delete;
+
+    QVector<AppInfoResult> m_items2BUpdate;
+    QVector<AppInfoResult> m_items2BInsert;
+    QStringList m_items2BDelete;
+
+Q_SIGNALS:
+    void appDBItemsUpdate(QVector<AppInfoResult>);
+    void appDBItemsAdd(QVector<AppInfoResult>);
+    void appDBItemsDelete(QStringList);
+};
+
+#endif // SIGNALTRANSFORMER_H
diff --git a/ukui-search-app-data-service/ukui-search-app-data-service.cpp b/ukui-search-app-data-service/ukui-search-app-data-service.cpp
index 176d061..1acef86 100644
--- a/ukui-search-app-data-service/ukui-search-app-data-service.cpp
+++ b/ukui-search-app-data-service/ukui-search-app-data-service.cpp
@@ -1,6 +1,11 @@
-#include <QDebug>
 #include "ukui-search-app-data-service.h"
 #include "app-db-manager.h"
+#include "signal-transformer.h"
+
+#include <QDBusConnection>
+#include <QDBusMetaType>
+#include <QDBusError>
+#include <QDebug>
 
 using namespace UkuiSearch;
 
@@ -12,9 +17,24 @@ UkuiSearchAppDataService::UkuiSearchAppDataService(int &argc, char *argv[], cons
     setQuitOnLastWindowClosed(false);
 
     if (!this->isRunning()) {
-        qDebug() << "First running";
+        qDebug() << "First running, I'm in app-db manager dbus rigister.";
+
+        qRegisterMetaType<AppInfoResult>("AppInfoResult");
+        qRegisterMetaType<QVector<AppInfoResult>>("QVector<AppInfoResult>");
+
+        qDBusRegisterMetaType<AppInfoResult>();
+        qDBusRegisterMetaType<QVector<AppInfoResult>>();
+
         AppDBManager::getInstance();
 
+        QDBusConnection sessionBus = QDBusConnection::sessionBus();
+        if (!sessionBus.registerService("com.ukui.search.appdb.service")) {
+            qCritical() << "QDbus register service failed reason:" << sessionBus.lastError();
+        }
+        if(!sessionBus.registerObject("/org/ukui/search/appDataBase", SignalTransformer::getTransformer(), QDBusConnection::ExportAllSignals)) {
+            qCritical() << "ukui-search-fileindex dbus register object failed reason:" << sessionBus.lastError();
+        }
+
         connect(this, &QtSingleApplication::messageReceived, [ & ](QString msg) {
             this->parseCmd(msg, true);
         });
diff --git a/ukui-search-app-data-service/ukui-search-app-data-service.pro b/ukui-search-app-data-service/ukui-search-app-data-service.pro
index 3a51d34..a48aa90 100644
--- a/ukui-search-app-data-service/ukui-search-app-data-service.pro
+++ b/ukui-search-app-data-service/ukui-search-app-data-service.pro
@@ -29,13 +29,14 @@ SOURCES += \
         main.cpp \
         convert-winid-to-desktop.cpp \
         app-db-manager.cpp \
+    signal-transformer.cpp \
         ukui-search-app-data-service.cpp \
 
 HEADERS += \
         convert-winid-to-desktop.h \
         app-db-manager.h \
+    signal-transformer.h \
         ukui-search-app-data-service.h \
-        app-db-common-defines.h \
 
 target.path = /usr/bin
 INSTALLS += target