diff --git a/kvdb_stage_demo/entry/src/main/ets/MainAbility/MainAbility.ts b/kvdb_stage_demo/entry/src/main/ets/MainAbility/MainAbility.ts
index fcaa9d3742b5ab6c8204b9502bc6a084a57bd389..3b7217c7c2e0658671b7d4f5360eafa3c18c0f8f 100644
--- a/kvdb_stage_demo/entry/src/main/ets/MainAbility/MainAbility.ts
+++ b/kvdb_stage_demo/entry/src/main/ets/MainAbility/MainAbility.ts
@@ -295,7 +295,13 @@ export default class MainAbility extends Ability {
             var devices = this.deviceList;
             console.info('[JSDemo] Sync start');
             this.logText += "Sync start\r\n";
-            this.kvStore.sync(devices, globalThis.syncMode);
+            try{
+                this.kvStore.sync(devices, globalThis.syncMode);
+            }catch (e){
+                console.info('[JSDemo] Sync error, err: ' + JSON.stringify(e) + '.');
+                this.logText += ("Sync error, err:"+ JSON.stringify(e) +"\r\n");
+            }
+
         })
 
         globalThis.DeleteAllData = (() =>{
@@ -324,8 +330,8 @@ export default class MainAbility extends Ability {
                 });
 
             } catch(e) {
-                console.log("[JSDemo] DeleteAllData err " + e);
-                this.logText += "DeleteAllData err" +JSON.stringify(e)+ "\r\n";
+                console.log("[JSDemo] DeleteAllData err " + JSON.stringify(e));
+                this.logText += ("DeleteAllData err" +JSON.stringify(e)+ "\r\n");
             }
         })
 
@@ -402,12 +408,11 @@ export default class MainAbility extends Ability {
                 this.logText += "RegSyncComplete kvStore is null.\r\n";
                 return;
             }
-            if (!this.syncListenerStarted) {
-                globalThis.startSyncListener();
-                this.logText += "Register syncComplete callback success.\r\n";
-            } else {
-                this.logText += "SyncComplete callback already registed.\r\n";
+            if (this.syncListenerStarted) {
+                this.logText += "SyncComplete callback already registed, now RegSyncComplete again start...\r\n";
             }
+            globalThis.startSyncListener();
+            this.logText += "Register syncComplete callback success.\r\n";
         })
 
         globalThis.RegDataChange = (() =>{
@@ -418,12 +423,11 @@ export default class MainAbility extends Ability {
                 this.logText += "RegDataChange kvStore is null.\r\n";
                 return;
             }
-            if (!this.dataListenerStarted) {
-                globalThis.startDataListener();
-                this.logText += "Register dataChange callback success.\r\n";
-            } else {
-                this.logText += "DataChange callback already registed.\r\n";
+            if (this.dataListenerStarted) {
+                this.logText += "DataChange callback already registed. now RegDataChange again start...\r\n";
             }
+            globalThis.startDataListener();
+            this.logText += "Register dataChange callback success.\r\n";
         })
 
         globalThis.printChangeData = ((notification) =>{
@@ -466,8 +470,8 @@ export default class MainAbility extends Ability {
                 });
                 this.dataListenerStarted = true;
             }catch(e) {
-                console.info("[JSDemo] startDataListener err " + e);
-                that.logText += "startDataListener err ." + e + "\r\n";
+                console.info("[JSDemo] startDataListener err " + JSON.stringify(e));
+                that.logText += "startDataListener err ." + JSON.stringify(e) + "\r\n";
                 this.dataListenerStarted = false;
             }
         })
@@ -495,8 +499,8 @@ export default class MainAbility extends Ability {
                 });
                 this.syncListenerStarted = true;
             }catch(e) {
-                console.info("[JSDemo] startSyncListener err " + e);
-                that.logText += "startSyncListener err.\r\n";
+                console.info("[JSDemo] startSyncListener err " + JSON.stringify(e));
+                that.logText += ("startSyncListener err," + JSON.stringify(e) + ".\r\n");
                 this.syncListenerStarted = false;
             }
         })