diff --git a/backend/SystemUpdater/UpdateManagerDbus.py b/backend/SystemUpdater/UpdateManagerDbus.py
index a1b6da0..17e780f 100755
--- a/backend/SystemUpdater/UpdateManagerDbus.py
+++ b/backend/SystemUpdater/UpdateManagerDbus.py
@@ -204,16 +204,25 @@ class UpdateManagerDbusController(dbus.service.Object):
             logging.error(False, str(e))
             return (False, str(e))
     
-    # 操作数据库的接口
-    @dbus.service.method(UPDATER_DBUS_INTERFACE, out_signature='b')
-    def DataBaseOpt(self, action='check',table='', cid=19):
-        if action == 'check':
-            try:
-                self.parent.sqlite3_server.find_msg_from_datebase(action, table, cid)
-            except Exception as e:
-                logging.error(str(e))
-                return False
-        return True
+    # # 操作数据库的接口
+    # @dbus.service.method(UPDATER_DBUS_INTERFACE, out_signature='b')
+    # def DataBaseOpt(self, action='check',table='', cid=19):
+    #     if action == 'check':
+    #         try:
+    #             self.parent.sqlite3_server.find_msg_from_datebase(action, table, cid)
+    #         except Exception as e:
+    #             logging.error(str(e))
+    #             return False
+    #     return True
+    
+    # dbus接口：向数据库display表中插入数据
+    @dbus.service.method(UPDATER_DBUS_INTERFACE, in_signature='ss', sender_keyword='sender')
+    def insert_install_state(self, item, value, sender=None):
+        try:
+            self.parent.sqlite3_server.insert_into_display(item, value)
+            logging.info("Database inserted successfully，options：%s，value：%s" % (item, value))
+        except Exception as e:
+            logging.error("Database insert failed，options：%s，value：%s" % (item, value))
     
     # # download certain package and its dependencies
     @dbus.service.method(UPDATER_DBUS_INTERFACE, in_signature='asi', out_signature='b')
@@ -254,7 +263,7 @@ class UpdateManagerDbusController(dbus.service.Object):
         try:
             f = open("/etc/apt/apt.conf.d/80apt-download", "r")
             value = f.readline().split()
-            return True, int(value[1][1:-2])
+            return True, str(value[1][1:-2])
         except:
             return False, 0