diff --git a/en/application-dev/reference/apis/js-apis-distributedMissionManager.md b/en/application-dev/reference/apis/js-apis-distributedMissionManager.md
index 4c7d2ea1d3d66e5d65118f376ed2a9300dd06cd3..c8085e7f37d85ca359b903a9ee8750788c3b5453 100644
--- a/en/application-dev/reference/apis/js-apis-distributedMissionManager.md
+++ b/en/application-dev/reference/apis/js-apis-distributedMissionManager.md
@@ -113,9 +113,9 @@ Registers a mission status listener. This API uses a promise to return the resul
   ```
 
 
-## distributedMissionManager.unregisterMissionListener
+## distributedMissionManager.unRegisterMissionListener
 
-unregisterMissionListener(parameter: MissionDeviceInfo, callback: AsyncCallback<void>): void;
+unRegisterMissionListener(parameter: MissionDeviceInfo, callback: AsyncCallback<void>): void;
 
 Deregisters a mission status listener. This API uses an asynchronous callback to return the result.
 
@@ -136,15 +136,15 @@ Deregisters a mission status listener. This API uses an asynchronous callback to
   var parameter =  {
   	deviceId: remoteDeviceId
   };
-  distributedMissionManager.unregisterMissionListener(parameter, (error) => {
+  distributedMissionManager.unRegisterMissionListener(parameter, (error) => {
       console.log("error.code = " + error.code)
   })
   ```
 
 
-## distributedMissionManager.unregisterMissionListener
+## distributedMissionManager.unRegisterMissionListener
 
-unregisterMissionListener(parameter: MissionDeviceInfo): Promise<void>
+unRegisterMissionListener(parameter: MissionDeviceInfo): Promise<void>
 
 Deregisters a mission status listener. This API uses a promise to return the result.
 
@@ -170,7 +170,7 @@ Deregisters a mission status listener. This API uses a promise to return the res
   var parameter =  {
   	deviceId: remoteDeviceId
   };
-  distributedMissionManager.unregisterMissionListener(parameter)
+  distributedMissionManager.unRegisterMissionListener(parameter)
   .then(data => {
       console.info('success data is ' + data);
   }).catch(error => {