diff --git a/libsearch/global-settings.cpp b/libsearch/global-settings.cpp
index 431c097..50b5765 100644
--- a/libsearch/global-settings.cpp
+++ b/libsearch/global-settings.cpp
@@ -15,7 +15,7 @@ GlobalSettings *GlobalSettings::getInstance()
 
 GlobalSettings::GlobalSettings(QObject *parent) : QObject(parent)
 {
-    m_settings = new QSettings("org.ukui", "ukui-search-blockdirs", this);
+    m_settings = new QSettings("org.ukui", "ukui-search", this);
     //the default number of transparency in mainwindow is 0.7
     //if someone changes the num in mainwindow, here should be modified too
     m_cache.insert(TRANSPARENCY_KEY, 0.7);
diff --git a/libsearch/global-settings.h b/libsearch/global-settings.h
index c943df7..4a3e3d6 100644
--- a/libsearch/global-settings.h
+++ b/libsearch/global-settings.h
@@ -14,6 +14,9 @@
 
 #define CONTROL_CENTER_PERSONALISE_GSETTINGS_ID "org.ukui.control-center.personalise"
 #define TRANSPARENCY_KEY "transparency"
+#define INDEX_DATABASE_STATE "index_database_state"
+#define CONTENT_INDEX_DATABASE_STATE "content_index_database_state"
+#define INDEX_GENERATOR_NORMAL_EXIT "index_generator_normal_exit"
 
 class LIBSEARCH_EXPORT GlobalSettings : public QObject
 {
diff --git a/libsearch/index/index-generator.cpp b/libsearch/index/index-generator.cpp
index e63ed88..f8aa88d 100644
--- a/libsearch/index/index-generator.cpp
+++ b/libsearch/index/index-generator.cpp
@@ -6,6 +6,7 @@
 #include "file-utils.h"
 #include "index-generator.h"
 #include "chinesecharacterstopinyin.h"
+#include "global-settings.h"
 
 #include <QtConcurrent>
 #include <QFuture>
@@ -57,9 +58,12 @@ bool IndexGenerator::creatAllIndex(QList<QVector<QString> > *messageList)
     }
     catch(const Xapian::Error &e)
     {
-        qDebug()<<"creatAllIndex fail!"<<QString::fromStdString(e.get_description());
+        qWarning()<<"creatAllIndex fail!"<<QString::fromStdString(e.get_description());
+        //need a record
+        GlobalSettings::getInstance()->setValue(INDEX_DATABASE_STATE,"0");
         return false;
     }
+    GlobalSettings::getInstance()->setValue(INDEX_DATABASE_STATE,"1");
     m_doc_list_path->clear();
     Q_EMIT this->transactionFinished();
 
@@ -86,9 +90,11 @@ bool IndexGenerator::creatAllIndex(QList<QString> *messageList)
     }
     catch(const Xapian::Error &e)
     {
-        qDebug()<<"creat content Index fail!"<<QString::fromStdString(e.get_description());
+        qWarning()<<"creat content Index fail!"<<QString::fromStdString(e.get_description());
+        GlobalSettings::getInstance()->setValue(CONTENT_INDEX_DATABASE_STATE,"0");
         return false;
     }
+    GlobalSettings::getInstance()->setValue(CONTENT_INDEX_DATABASE_STATE,"1");
     m_doc_list_content->clear();
     Q_EMIT this->transactionFinished();
     return true;
@@ -99,10 +105,16 @@ IndexGenerator::IndexGenerator(QObject *parent) : QObject(parent)
 {
     m_datebase_path = new Xapian::WritableDatabase(INDEX_PATH, Xapian::DB_CREATE_OR_OPEN);
     m_database_content = new Xapian::WritableDatabase(CONTENT_INDEX_PATH, Xapian::DB_CREATE_OR_OPEN);
+    GlobalSettings::getInstance()->setValue(CONTENT_INDEX_DATABASE_STATE,"1");
 }
 
 IndexGenerator::~IndexGenerator()
 {
+    if(m_datebase_path)
+        delete m_datebase_path;
+    if(m_database_content)
+        delete m_database_content;
+    GlobalSettings::getInstance()->setValue(INDEX_GENERATOR_NORMAL_EXIT,"1");
 }
 
 void IndexGenerator::insertIntoDatabase(Document doc)
@@ -329,7 +341,7 @@ bool IndexGenerator::deleteAllIndex(QStringList *pathlist)
         }
         catch(const Xapian::Error &e)
         {
-            qDebug() <<QString::fromStdString(e.get_description());
+            qWarning() <<QString::fromStdString(e.get_description());
             return false;
         }
     }
diff --git a/libsearch/index/index-generator.h b/libsearch/index/index-generator.h
index 6c098ec..68c221c 100644
--- a/libsearch/index/index-generator.h
+++ b/libsearch/index/index-generator.h
@@ -28,6 +28,7 @@ public Q_SLOTS:
 
 private:
     explicit IndexGenerator(QObject *parent = nullptr);
+    ~IndexGenerator();
     //For file name index
     void HandlePathList(QList<QVector<QString>> *messageList);
     //For file content index
@@ -37,7 +38,6 @@ private:
     //add one data in database
     void insertIntoDatabase(Document doc);
     void insertIntoContentDatabase(Document doc);
-    ~IndexGenerator();
 
     QMap<QString,QStringList> *m_index_map;
     QList<Document> *m_doc_list_path;  //for path index