diff --git a/en/application-dev/device/device-location-geocoding.md b/en/application-dev/device/device-location-geocoding.md
index e0080e3e87ddfc28779c7023c75d464e23af78da..f95df63eebe64eedb6063ae193f4b141bfd946c6 100644
--- a/en/application-dev/device/device-location-geocoding.md
+++ b/en/application-dev/device/device-location-geocoding.md
@@ -36,13 +36,29 @@ The following table describes APIs available for mutual conversion between coord
    import geolocation from '@ohos.geolocation';
    ```
 
-2. Obtain the conversion result.
+2. Query whether geocoder service is available.
+   - Call **isGeoServiceAvailable** to query whether the geocoder service is available. If the service is available, continue with step 3.
+      ```
+      geolocation.isGeoServiceAvailable((err, data) => {
+          if (err) {
+              console.log('isGeoServiceAvailable err: ' + JSON.stringify(err));
+          } else {
+              console.log('isGeoServiceAvailable data: ' + JSON.stringify(data));
+          }
+      });
+      ```
+
+3. Obtain the conversion result.
    - Call **getAddressesFromLocation** to convert coordinates into geographical location information.
      
       ```
       var reverseGeocodeRequest = {"latitude": 31.12, "longitude": 121.11, "maxItems": 1};
-      geolocation.getAddressesFromLocation(reverseGeocodeRequest, (data) => {
-          console.log('getAddressesFromLocation: ' + JSON.stringify(data));
+      geolocation.getAddressesFromLocation(reverseGeocodeRequest, (err, data) => {
+          if (err) {
+              console.log('getAddressesFromLocation err: ' + JSON.stringify(err));
+          } else {
+              console.log('getAddressesFromLocation data: ' + JSON.stringify(data));
+          }
       });
       ```
 
@@ -51,8 +67,12 @@ The following table describes APIs available for mutual conversion between coord
      
       ```
       var geocodeRequest = {"description": "No. xx, xx Road, Pudong District, Shanghai", "maxItems": 1};
-      geolocation.getAddressesFromLocationName(geocodeRequest, (data) => {
-          console.log('getAddressesFromLocationName: ' + JSON.stringify(data));
+      geolocation.getAddressesFromLocationName(geocodeRequest, (err, data) => {
+          if (err) {
+              console.log('getAddressesFromLocationName err: ' + JSON.stringify(err));
+          } else {
+              console.log('getAddressesFromLocationName data: ' + JSON.stringify(data));
+          }
       });
       ```
 
diff --git a/en/application-dev/device/device-location-info.md b/en/application-dev/device/device-location-info.md
index 84f189d7f247bd9516204c7dd0d76aafb6438dbb..dce40ff38546fe1b86a60bf670cb18adf9e15968 100644
--- a/en/application-dev/device/device-location-info.md
+++ b/en/application-dev/device/device-location-info.md
@@ -123,7 +123,7 @@ To learn more about the APIs for obtaining device location information, see [Geo
      The following example instantiates the **RequestParam** object for navigation:
    
    ```
-   var requestInfo = {'scenario': 0x301, 'timeInterval': 0, 'distanceInterval': 0, 'maxAccuracy': 0};
+   var requestInfo = {'scenario': geolocation.LocationRequestScenario.NAVIGATION, 'timeInterval': 0, 'distanceInterval': 0, 'maxAccuracy': 0};
    ```
 
    **Method 2:**
@@ -152,7 +152,7 @@ To learn more about the APIs for obtaining device location information, see [Geo
      The following example instantiates the **RequestParam** object for the location accuracy priority policy:
    
    ```
-   var requestInfo = {'priority': 0x201, 'timeInterval': 0, 'distanceInterval': 0, 'maxAccuracy': 0};
+   var requestInfo = {'priority': geolocation.LocationRequestPriority.ACCURACY, 'timeInterval': 0, 'distanceInterval': 0, 'maxAccuracy': 0};
    ```
 
 4. Instantiate the **Callback** object for the system to report location results.
@@ -179,8 +179,12 @@ To learn more about the APIs for obtaining device location information, see [Geo
    If your application does not need the real-time device location, it can use the last known device location cached in the system instead.
    
    ```
-   geolocation.getLastLocation((data) => {
-       console.log('getLastLocation: data: ' + JSON.stringify(data));
+   geolocation.getLastLocation((err, data) => {
+       if (err) {
+           console.log('getLastLocation: err: ' + JSON.stringify(err));
+       } else {
+           console.log('getLastLocation: data: ' + JSON.stringify(data));
+       }
    });
    ```
 
diff --git a/zh-cn/application-dev/device/device-location-geocoding.md b/zh-cn/application-dev/device/device-location-geocoding.md
index d15b8df3418540ef13cedde828173a1948d9e8fc..8e87eab224a108cd6b620b3bda272c39abda82e8 100644
--- a/zh-cn/application-dev/device/device-location-geocoding.md
+++ b/zh-cn/application-dev/device/device-location-geocoding.md
@@ -39,13 +39,30 @@
    import geolocation from '@ohos.geolocation';
    ```
 
-2. 获取转化结果。
+2. 查询geoCoder服务是否可用。
+   - 调用isGeoServiceAvailable查询geoCoder服务是否可用，如果服务可用再继续进行步骤3。
+        
+      ```
+      geolocation.isGeoServiceAvailable((err, data) => {
+          if (err) {
+              console.log('isGeoServiceAvailable err: ' + JSON.stringify(err));
+          } else {
+              console.log('isGeoServiceAvailable data: ' + JSON.stringify(data));
+          }
+      });
+      ```
+
+3. 获取转化结果。
    - 调用getAddressesFromLocation，坐标转化地理位置信息。
         
       ```
       var reverseGeocodeRequest = {"latitude": 31.12, "longitude": 121.11, "maxItems": 1};
-      geolocation.getAddressesFromLocation(reverseGeocodeRequest, (data) => {
-          console.log('getAddressesFromLocation: ' + JSON.stringify(data));
+      geolocation.getAddressesFromLocation(reverseGeocodeRequest, (err, data) => {
+          if (err) {
+              console.log('getAddressesFromLocation err: ' + JSON.stringify(err));
+          } else {
+              console.log('getAddressesFromLocation data: ' + JSON.stringify(data));
+          }
       });
       ```
 
@@ -54,8 +71,12 @@
         
       ```
       var geocodeRequest = {"description": "上海市浦东新区xx路xx号", "maxItems": 1};
-      geolocation.getAddressesFromLocationName(geocodeRequest, (data) => {
-          console.log('getAddressesFromLocationName: ' + JSON.stringify(data));
+      geolocation.getAddressesFromLocationName(geocodeRequest, (err, data) => {
+          if (err) {
+              console.log('getAddressesFromLocationName err: ' + JSON.stringify(err));
+          } else {
+              console.log('getAddressesFromLocationName data: ' + JSON.stringify(data));
+          }
       });
       ```
 
diff --git a/zh-cn/application-dev/device/device-location-info.md b/zh-cn/application-dev/device/device-location-info.md
index dd33246667312f12f97424d63da27b03cf24682a..9aa69b81798ff67508e57c70ca22374e6da16907 100644
--- a/zh-cn/application-dev/device/device-location-info.md
+++ b/zh-cn/application-dev/device/device-location-info.md
@@ -123,7 +123,7 @@
      以导航场景为例，实例化方式如下：
    
    ```
-   var requestInfo = {'scenario': 0x301, 'timeInterval': 0, 'distanceInterval': 0, 'maxAccuracy': 0};
+   var requestInfo = {'scenario': geolocation.LocationRequestScenario.NAVIGATION, 'timeInterval': 0, 'distanceInterval': 0, 'maxAccuracy': 0};
    ```
 
    **方式二：**
@@ -152,7 +152,7 @@
      以定位精度优先策略为例，实例化方式如下：
    
    ```
-   var requestInfo = {'priority': 0x201, 'timeInterval': 0, 'distanceInterval': 0, 'maxAccuracy': 0};
+   var requestInfo = {'priority': geolocation.LocationRequestPriority.ACCURACY, 'timeInterval': 0, 'distanceInterval': 0, 'maxAccuracy': 0};
    ```
 
 4. 实例化Callback对象，用于向系统提供位置上报的途径。
@@ -179,8 +179,12 @@
 如果应用使用场景不需要实时的设备位置，可以获取系统缓存的最近一次历史定位结果。
      
    ```
-   geolocation.getLastLocation((data) => {
-       console.log('getLastLocation: data: ' + JSON.stringify(data));
+   geolocation.getLastLocation((err, data) => {
+       if (err) {
+           console.log('getLastLocation: err: ' + JSON.stringify(err));
+       } else {
+           console.log('getLastLocation: data: ' + JSON.stringify(data));
+       }
    });
    ```