diff --git a/zh-cn/application-dev/background-task-management/background-task-dev-guide.md b/zh-cn/application-dev/background-task-management/background-task-dev-guide.md
index 96b18a9a5ac001e5d9cfa82ab7d43b0b849ec9e5..1813639e5dbf43858b25d0d2806a6ecd2164f53a 100644
--- a/zh-cn/application-dev/background-task-management/background-task-dev-guide.md
+++ b/zh-cn/application-dev/background-task-management/background-task-dev-guide.md
@@ -41,7 +41,7 @@
     backgroundTaskManager.getRemainingDelayTime(id).then( res => {
         console.log('promise => Operation getRemainingDelayTime succeeded. Data: ' + JSON.stringify(res));
     }).catch( err => {
-        console.log('promise => Operation getRemainingDelayTime failed. Cause: ' + err.data);
+        console.log('promise => Operation getRemainingDelayTime failed. Cause: ' + err.code);
     });
     ```
 
@@ -74,7 +74,7 @@ console.info("The actualDelayTime is: " + time);
 backgroundTaskManager.getRemainingDelayTime(id).then( res => {
     console.log('promise => Operation getRemainingDelayTime succeeded. Data: ' + JSON.stringify(res));
 }).catch( err => {
-    console.log('promise => Operation getRemainingDelayTime failed. Cause: ' + err.data);
+    console.log('promise => Operation getRemainingDelayTime failed. Cause: ' + err.code);
 });
 
 // 取消延迟挂起
diff --git a/zh-cn/application-dev/reference/apis/js-apis-backgroundTaskManager.md b/zh-cn/application-dev/reference/apis/js-apis-backgroundTaskManager.md
index 3f8d0e482e570296e4a5503792b34e42721c5043..cd406a2eba07ebd39888a152b0db55f20744dee9 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-backgroundTaskManager.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-backgroundTaskManager.md
@@ -66,10 +66,10 @@ getRemainingDelayTime(requestId: number, callback: AsyncCallback<number>):
   ```js
   let id = 1;
   backgroundTaskManager.getRemainingDelayTime(id, (err, res) => {
-      if(err.data === 0) {
-          console.log('callback => Operation getRemainingDelayTime succeeded. Data: ' + JSON.stringify(res));
+      if(err) {
+          console.log('callback => Operation getRemainingDelayTime failed. Cause: ' + err.code);
       } else {
-          console.log('callback => Operation getRemainingDelayTime failed. Cause: ' + err.data);
+          console.log('callback => Operation getRemainingDelayTime succeeded. Data: ' + JSON.stringify(res));
       }
   })
   ```
@@ -99,7 +99,7 @@ getRemainingDelayTime(requestId: number): Promise<number>
   backgroundTaskManager.getRemainingDelayTime(id).then( res => {
       console.log('promise => Operation getRemainingDelayTime succeeded. Data: ' + JSON.stringify(res));
   }).catch( err => {
-      console.log('promise => Operation getRemainingDelayTime failed. Cause: ' + err.data);
+      console.log('promise => Operation getRemainingDelayTime failed. Cause: ' + err.code);
   })
   ```