diff --git a/zh-cn/application-dev/file-management/medialibrary-album-guidelines.md b/zh-cn/application-dev/file-management/medialibrary-album-guidelines.md
index b150c7aed2273e763dce9b837e9fedacfc83963e..60043767345181ea2a247fd8b30ac155b7993d0c 100644
--- a/zh-cn/application-dev/file-management/medialibrary-album-guidelines.md
+++ b/zh-cn/application-dev/file-management/medialibrary-album-guidelines.md
@@ -46,10 +46,10 @@ async function example() {
     const path = await media.getPublicDirectory(DIR_IMAGE);
     //myAlbum为新建文件保存路径，也是新建相册的名称
     media.createAsset(mediaType, 'test.jpg', path + 'myAlbum/', (err, fileAsset) => {
-        if (fileAsset != undefined) {
-        console.info('createAlbum successfully, message = ' + fileAsset);
+        if (fileAsset === undefined) {
+            console.error('createAlbum failed, message = ' + err);
         } else {
-        console.info('createAlbum failed, message = ' + err);
+            console.info('createAlbum successfully, message = ' + JSON.stringify(fileAsset));
         }
     });
 }
@@ -85,10 +85,10 @@ async function example() {
     let album = albumList[0];
     album.albumName = 'newAlbum';
     //回调返回空
-    album.commitModify().then(function() {
+    album.commitModify().then(() => {
         console.info("albumRename successfully");
-    }).catch(function(err){
-        console.info("albumRename failed with error: " + err);
+    }).catch((err) => {
+        console.error("albumRename failed with error: " + err);
     });
 }
 ```
diff --git a/zh-cn/application-dev/file-management/medialibrary-filepath-guidelines.md b/zh-cn/application-dev/file-management/medialibrary-filepath-guidelines.md
index 259774688fc5cc8031d31dd1909cb94e8a13f8c5..b42db693e0fe55e97061356d5040e4ff0b2cab0a 100644
--- a/zh-cn/application-dev/file-management/medialibrary-filepath-guidelines.md
+++ b/zh-cn/application-dev/file-management/medialibrary-filepath-guidelines.md
@@ -30,7 +30,7 @@ Openharmony上用户数据统一由媒体库进行管理，用户数据用户数
 **前提条件** 
 
 - 获取媒体库mediaLibrary实例。
-- 申请媒体库读权限“ohos.permission.READ_MEDIA。
+- 申请媒体库读权限"ohos.permission.READ_MEDIA"。
 
 下面以获取Camera文件保存的公共目录为例。
 
@@ -43,7 +43,7 @@ async function example(){
     if (dicResult == 'Camera/') {
         console.info('mediaLibraryTest : getPublicDirectory passed');
     } else {
-        console.info('mediaLibraryTest : getPublicDirectory failed');
+        console.error('mediaLibraryTest : getPublicDirectory failed');
     }
 }
 ```
@@ -58,47 +58,52 @@ OpenHarmony提供应用沙箱机制，增加目录可见性数据访问防线，
 
 通过接口[mediaLibrary.FileAsset.open](../reference/apis/js-apis-medialibrary.md#open8-1)可以打开公共路径文件。
 
-通过接口[fileio.open](../reference/apis/js-apis-fileio.md#fileioopen7)可以打开沙箱路径文件，沙箱路径必须通过应用上下文context进行访问。
+通过接口[fs.open](../reference/apis/js-apis-file-fs.md#fsopen)可以打开沙箱路径文件，沙箱路径必须通过应用上下文context进行访问。
 
 **前提条件**
 
 - 获取媒体库mediaLibrary实例。
-- 申请媒体库读写权限“ohos.permission.WRITE_MEDIA。
-- 除了@ohos.multimedia.mediaLibrary外，还需要导入模块[@ohos.fileio](../reference/apis/js-apis-fileio.md)。
+- 申请媒体库读写权限"ohos.permission.READ_MEDIA, ohos.permission.WRITE_MEDIA"。
+- 除了@ohos.multimedia.mediaLibrary外，还需要导入模块[@ohos.file.fs](../reference/apis/js-apis-file-fs.md)。
+- 测试文件 "testFile.txt" 已创建且有文件内容。
 
 **开发步骤**
 
-1. 调用[context.filesDir](../reference/apis/js-apis-inner-app-context.md#contextgetfilesdir)获取应用沙箱路径。
+1. 调用[context.filesDir](../reference/apis/js-apis-file-fs.md)获取应用沙箱路径。
 2. 调用MediaLibrary.getFileAssets和FetchFileResult.getFirstObject获取公共目录中的FileAsset实例。
-3. 调用fileio.open打开沙箱路径文件。
+3. 调用fs.open打开沙箱路径文件。
 4. 调用fileAsset.open打开公共路径文件。
-5. 调用fileio.copyfile复制文件。
-6. 调用fileAsset.close和fileio.close关闭文件。
+5. 调用[fs.copyfile](../reference/apis/js-apis-file-fs.md#fscopyfile)复制文件。
+6. 调用fileAsset.close和[fs.close](../reference/apis/js-apis-file-fs.md#fsclose)关闭文件。
 
 **示例1 将公共路径文件复制到沙箱路径下**
 
 ```ts
 async function copyPublic2Sandbox() {
-    const context = getContext(this);
-    let media = mediaLibrary.getMediaLibrary(context);
-    let sandboxDirPath = globalThis.context.filesDir;
-    let fileKeyObj = mediaLibrary.FileKey;
-    let fileAssetFetchOp = {
-        selections: fileKeyObj.DISPLAY_NAME + '= ?',
-        selectionArgs: ['testFile.txt'],
-    };
-    let fetchResult = await media.getFileAssets(fileAssetFetchOp);
-    let fileAsset = await fetchResult.getFirstObject();
+    try {
+        const context = getContext(this);
+        let media = mediaLibrary.getMediaLibrary(context);
+        let sandboxDirPath = context.filesDir;
+        let fileKeyObj = mediaLibrary.FileKey;
+        let fileAssetFetchOp = {
+            selections: fileKeyObj.DISPLAY_NAME + '= ?',
+            selectionArgs: ['testFile.txt'],
+        };
+        let fetchResult = await media.getFileAssets(fileAssetFetchOp);
+        let fileAsset = await fetchResult.getFirstObject();
 
-    let fdPub = await fileAsset.open('rw');
-    let fdSand = await fileio.open(sandboxDirPath + '/testFile.txt', 0o2 | 0o100, 0o666);
-    await fileio.copyFile(fdPub, fdSand);
+        let fdPub = await fileAsset.open('rw');
+        let fdSand = await fs.open(sandboxDirPath + '/testFile.txt', fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE);
+        await fs.copyFile(fdPub, fdSand.fd);
 
-    await fileAsset.close(fdPub);
-    await fileio.close(fdSand);
+        await fileAsset.close(fdPub);
+        await fs.close(fdSand.fd);
 
-    let content_sand = await fileio.readText(sandboxDirPath + '/testFile.txt');
-    console.log('content read from sandbox file: ', content_sand)
+        let content_sand = await fs.readText(sandboxDirPath + '/testFile.txt');
+        console.info('content read from sandbox file: ', content_sand)
+    } catch (err) {
+        console.info('[demo] copyPublic2Sandbox fail, err: ', err);
+    }
 }
 ```
 
@@ -108,7 +113,7 @@ async function copyPublic2Sandbox() {
 async function copySandbox2Public() {
     const context = getContext(this);
     let media = mediaLibrary.getMediaLibrary(context);
-    let sandboxDirPath = globalThis.context.filesDir;
+    let sandboxDirPath = context.filesDir;
 
     let DIR_DOCUMENTS = mediaLibrary.DirectoryType.DIR_DOCUMENTS;
     const publicDirPath = await media.getPublicDirectory(DIR_DOCUMENTS);
@@ -116,7 +121,7 @@ async function copySandbox2Public() {
         let fileAsset = await media.createAsset(mediaLibrary.MediaType.FILE, 'testFile02.txt', publicDirPath);
         console.info('createFile successfully, message = ' + fileAsset);
     } catch (err) {
-        console.info('createFile failed, message = ' + err);
+        console.error('createFile failed, message = ' + err);
     }
     try {
         let fileKeyObj = mediaLibrary.FileKey;
@@ -127,35 +132,35 @@ async function copySandbox2Public() {
         let fetchResult = await media.getFileAssets(fileAssetFetchOp);
         var fileAsset = await fetchResult.getFirstObject();
     } catch (err) {
-        console.info('file asset get failed, message = ' + err);
+        console.error('file asset get failed, message = ' + err);
     }
     let fdPub = await fileAsset.open('rw');
-    let fdSand = await fileio.open(sandboxDirPath + 'testFile.txt', 0o2);
-    await fileio.copyFile(fdSand, fdPub);
-    await fileio.close(fdPub);
-    await fileio.close(fdSand);
+    let fdSand = await fs.open(sandboxDirPath + 'testFile.txt', OpenMode.READ_WRITE);
+    await fs.copyFile(fdSand.fd, fdPub);
+    await fileAsset.close(fdPub);
+    await fs.close(fdSand.fd);
     let fdPubRead = await fileAsset.open('rw');
     try {
         let arrayBuffer = new ArrayBuffer(4096);
-        await fileio.read(fdPubRead, arrayBuffer);
+        await fs.read(fdPubRead, arrayBuffer);
         var content_pub = String.fromCharCode(...new Uint8Array(arrayBuffer));
         fileAsset.close(fdPubRead);
     } catch (err) {
-        console.log('read text failed, message = ', err);
+        console.error('read text failed, message = ', err);
     }
-    console.log('content read from public file: ', content_pub);
+    console.info('content read from public file: ', content_pub);
 }
 ```
 
 ### 读写文件内容
 
-通过[mediaLibrary](../reference/apis/js-apis-medialibrary.md)的接口FileAsset.open和FileAsset.close可以打开和关闭文件。通过[fileio](../reference/apis/js-apis-fileio.md)的接口fileio.read和fileio.write可以读写文件。
+通过[mediaLibrary](../reference/apis/js-apis-medialibrary.md)的接口FileAsset.open和FileAsset.close可以打开和关闭文件。通过[file.fs](../reference/apis/js-apis-file-fs.md)中的接口fs.read和fs.write可以读写文件。
 
 **前提条件**
 
 - 获取媒体库mediaLibrary实例。
-- 申请媒体库读写权限“ohos.permission.WRITE_MEDIA。
-- 除了@ohos.multimedia.mediaLibrary外，还需要导入模块[@ohos.fileio](../reference/apis/js-apis-fileio.md)。
+- 申请媒体库读写权限"ohos.permission.READ_MEDIA, ohos.permission.WRITE_MEDIA"。
+- 除了@ohos.multimedia.mediaLibrary外，还需要导入模块[@ohos.file.fs](../reference/apis/js-apis-file-fs.md)。
 
 **开发步骤**
 
@@ -168,19 +173,19 @@ async function copySandbox2Public() {
        const context = getContext(this);
        let media = mediaLibrary.getMediaLibrary(context);
        const path = await media.getPublicDirectory(DIR_DOCUMENTS);
-       media.createAsset(mediaType, "testFile.text", path).then (function (asset) {
+       media.createAsset(mediaType, "testFile.text", path).then((asset) => {
            console.info("createAsset successfully:" + JSON.stringify(asset));
-       }).catch(function(err){
-           console.info("createAsset failed with error: " + err);
+       }).catch((err) => {
+           console.error("createAsset failed with error: " + err);
        });
    }
    ```
 
 2. 使用open打开文件。
 
-3. 使用fileio.write写入文件，以string形式传入写入数据。
+3. 使用[fs.write](../reference/apis/js-apis-file-fs.md#fswrite)写入文件，以string形式传入写入数据。
 
-4. 使用fileio.read读取文件，以 ArrayBuffer 形式保存读取结果。
+4. 使用[fs.read](../reference/apis/js-apis-file-fs.md#fsread)读取文件，以 ArrayBuffer 形式保存读取结果。
 
 5. 将ArrayBuffer转化为string，以string形式得到文件内容。
 
@@ -204,10 +209,10 @@ async function writeOnlyPromise() {
     try {
         let fd = await fileAsset.open('w');
         console.info('file descriptor: ', fd);
-        await fileio.write(fd, "Write file test content.");
+        await fs.write(fd, "Write file test content.");
         await fileAsset.close(fd);
     } catch (err) {
-        console.info('write file failed, message = ', err);
+        console.error('write file failed, message = ', err);
     }
 }
 ```
@@ -230,14 +235,14 @@ async function readOnlyPromise() {
     try {
         let fd = await fileAsset.open('r');
         let arrayBuffer = new ArrayBuffer(4096);
-        await fileio.read(fd, arrayBuffer);
+        await fs.read(fd, arrayBuffer);
         let fileContent = String.fromCharCode(...new Uint8Array(arrayBuffer));
         globalThis.fileContent = fileContent;
         globalThis.fileName = fileAsset.displayName;
         console.info('file content: ', fileContent);
         await fileAsset.close(fd);
     } catch (err) {
-        console.info('read file failed, message = ', err);
+        console.error('read file failed, message = ', err);
     }
 }
 ```
diff --git a/zh-cn/application-dev/file-management/medialibrary-overview.md b/zh-cn/application-dev/file-management/medialibrary-overview.md
index ca8a6c4516853d181a9f27dc0f10ced9853e7e13..fd8b9fb3eceddf04b6c87948703e5879702ba5bd 100644
--- a/zh-cn/application-dev/file-management/medialibrary-overview.md
+++ b/zh-cn/application-dev/file-management/medialibrary-overview.md
@@ -109,19 +109,19 @@ let media = mediaLibrary.getMediaLibrary(context);
    import abilityAccessCtrl, {Permissions} from '@ohos.abilityAccessCtrl';
    
    export default class EntryAbility extends UIAbility {
-       onWindowStageCreate(windowStage) {
-           let list : Array<Permissions> = ['ohos.permission.READ_MEDIA', 'ohos.permission.WRITE_MEDIA'];
-           let permissionRequestResult;
-           let atManager = abilityAccessCtrl.createAtManager();
-           atManager.requestPermissionsFromUser(this.context, list, (err, result) => {
-               if (err) {
-                   console.log('requestPermissionsFromUserError: ' + JSON.stringify(err));
-               } else {
-                   permissionRequestResult=result;
-                   console.log('permissionRequestResult: ' + JSON.stringify(permissionRequestResult));
-               }    
-           });       
-       }
-   }
+        onWindowStageCreate(windowStage) {
+            let list : Array<Permissions> = ['ohos.permission.READ_MEDIA', 'ohos.permission.WRITE_MEDIA'];
+            let permissionRequestResult;
+            let atManager = abilityAccessCtrl.createAtManager();
+            atManager.requestPermissionsFromUser(this.context, list, (err, result) => {
+                if (err) {
+                    console.error('requestPermissionsFromUserError: ' + JSON.stringify(err));
+                } else {
+                    permissionRequestResult=result;
+                    console.info('permissionRequestResult: ' + JSON.stringify(permissionRequestResult));
+                }    
+            });       
+        }
+    }
    ```
 
diff --git a/zh-cn/application-dev/file-management/medialibrary-resource-guidelines.md b/zh-cn/application-dev/file-management/medialibrary-resource-guidelines.md
index c64f25916fd0f07110d3d33079c9f71c9b268a2a..9277bfdf74bbd442f475e409b47325ba785f4a79 100644
--- a/zh-cn/application-dev/file-management/medialibrary-resource-guidelines.md
+++ b/zh-cn/application-dev/file-management/medialibrary-resource-guidelines.md
@@ -42,21 +42,24 @@ async function example() {
     const context = getContext(this);
     let media = mediaLibrary.getMediaLibrary(context);
     const fetchFileResult = await media.getFileAssets(option);
-    for (let i = 0; i < fetchFileResult.getCount(); i++) {
-        fetchFileResult.getNextObject((err, fileAsset) => {
-        if (err) {
-            console.error('Failed ');
-            return;
+    fetchFileResult.getFirstObject().then((fileAsset) => {
+        console.log('getFirstObject.displayName : ' + fileAsset.displayName);
+        for (let i = 1; i < fetchFileResult.getCount(); i++) {
+            fetchFileResult.getNextObject().then((fileAsset) => {
+                console.info('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
+            }).catch((err) => {
+                console.error('Failed to get next object: ' + err);
+            });
         }
-        console.log('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
-        })
-    } 
+    }).catch((err) => {
+        console.error('Failed to get first object: ' + err);
+    });
 }
 ```
 
 ### 指定日期
 
-下面以查询指定添加日期的媒体资源为例。实际开发中可以设置添加日期、修改日期、拍摄日期。
+下面以查询指定添加日期至今的所有媒体资源为例。实际开发中可以设置添加日期、修改日期、拍摄日期。
 
 selections： FileKey.DATE_ADDED，根据文件添加日期检索。
 
@@ -66,21 +69,24 @@ selectionArgs：2022-8-5，具体添加时间的字符串。
 async function example() {
     let fileKeyObj = mediaLibrary.FileKey;
     let option = {
-        selections: fileKeyObj.DATE_ADDED + '= ?',
-        selectionArgs: ['2022-8-5'],
+    selections: fileKeyObj.DATE_ADDED + '> ?',
+    selectionArgs: ['2022-8-5'],
     };
     const context = getContext(this);
     let media = mediaLibrary.getMediaLibrary(context);
     const fetchFileResult = await media.getFileAssets(option);
-    for (let i = 0; i < fetchFileResult.getCount(); i++) {
-        fetchFileResult.getNextObject((err, fileAsset) => {
-        if (err) {
-            console.error('Failed ');
-            return;
+    fetchFileResult.getFirstObject().then((fileAsset) => {
+        console.info('getFirstObject.displayName : ' + fileAsset.displayName);
+        for (let i = 1; i < fetchFileResult.getCount(); i++) {
+            fetchFileResult.getNextObject().then((fileAsset) => {
+                console.info('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
+            }).catch((err) => {
+                console.error('Failed to get next object: ' + err);
+            });
         }
-        console.log('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
-        })
-    } 
+    }).catch((err) => {
+        console.error('Failed to get first object: ' + err);
+    });
 }
 ```
 
@@ -102,15 +108,18 @@ async function example() {
     const context = getContext(this);
     let media = mediaLibrary.getMediaLibrary(context);
     const fetchFileResult = await media.getFileAssets(option);
-    for (let i = 0; i < fetchFileResult.getCount(); i++) {
-        fetchFileResult.getNextObject((err, fileAsset) => {
-        if (err) {
-            console.error('Failed ');
-            return;
+    fetchFileResult.getFirstObject().then((fileAsset) => {
+        console.info('getFirstObject.displayName : ' + fileAsset.displayName);
+        for (let i = 1; i < fetchFileResult.getCount(); i++) {
+            fetchFileResult.getNextObject().then((fileAsset) => {
+                console.info('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
+            }).catch((err) => {
+                console.error('Failed to get next object: ' + err);
+            });
         }
-        console.log('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
-        })
-    } 
+    }).catch((err) => {
+        console.error('Failed to get first object: ' + err);
+    });
 }
 ```
 
@@ -133,15 +142,15 @@ async function example() {
     const context = getContext(this);
     let media = mediaLibrary.getMediaLibrary(context);
     const fetchFileResult = await media.getFileAssets(option);
-    for (let i = 0; i < fetchFileResult.getCount(); i++) {
-        fetchFileResult.getNextObject((err, fileAsset) => {
-        if (err) {
-            console.error('Failed ');
-            return;
-        }
-        console.log('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
-        })
-    } 
+    if (albumList.length > 0) {
+        fetchFileResult.getFirstObject().then((album) => {
+            console.info('getFirstObject.displayName : ' + album.albumName);
+        }).catch((err) => {
+            console.error('Failed to get first object: ' + err);
+        });
+    } else {
+        console.info('getAlbum list is: 0');
+    }
 }
 ```
 
@@ -172,10 +181,10 @@ async function example() {
 
    ```ts
    let fileKeyObj = mediaLibrary.FileKey;
-   let imageType = mediaLibrary.MediaType.VIDEO;
-   let imagesFetchOp  = {
+   let videoType = mediaLibrary.MediaType.VIDEO;
+   let videoFetchOp  = {
        selections: fileKeyObj.MEDIA_TYPE + '= ?',
-       selectionArgs: [imageType.toString()],
+       selectionArgs: [videoType.toString()],
    }
    ```
 
@@ -188,10 +197,10 @@ async function getCameraImagePromise() {
     const context = getContext(this);
     let media = mediaLibrary.getMediaLibrary(context);
     let fileKeyObj = mediaLibrary.FileKey;
-    let imageType = mediaLibrary.MediaType.IMAGE;
-    let imagesFetchOp = {
+    let videoType = mediaLibrary.MediaType.VIDEO;
+    let videoFetchOp = {
         selections: fileKeyObj.MEDIA_TYPE + '= ?',
-        selectionArgs: [imageType.toString()],
+        selectionArgs: [videoType.toString()],
     }
     let AlbumNoArgsFetchOp = {
         selections: fileKeyObj.ALBUM_NAME + '= ?',
@@ -201,9 +210,9 @@ async function getCameraImagePromise() {
     let albumList = await media.getAlbums(AlbumNoArgsFetchOp);
     if (albumList.length > 0) {
         const album = albumList[0];
-        let fetchFileResult = await album.getFileAssets(imagesFetchOp);
+        let fetchFileResult = await album.getFileAssets(videoFetchOp);
         let count = fetchFileResult.getCount();
-        console.info("get mediaLibrary IMAGE number", count);
+        console.info("get mediaLibrary VIDEO number", count);
     } else {
         console.info('getAlbum list is: 0');
     }
@@ -245,19 +254,20 @@ async function getFirstThumbnailPromise() {
 
     let size = { width: 720, height: 720 };
     const fetchFileResult = await media.getFileAssets(imagesFetchOp);
-    if (fetchFileResult != undefined) {
+    if (fetchFileResult === undefined) {
+        console.error("get image failed with error");
+        return;
+    } else {
         const asset = await fetchFileResult.getFirstObject();
         asset.getThumbnail(size).then((pixelMap) => {
-          pixelMap.getImageInfo().then((info) => {
+            pixelMap.getImageInfo().then((info) => {
               console.info('get Thumbnail info: ' + "width: " + info.size.width + " height: " + info.size.height);
-          }).catch((err) => {
-              console.info("getImageInfo failed with error:" + err);
-          });
+            }).catch((err) => {
+              console.error("getImageInfo failed with error: " + err);
+            });
         }).catch((err) => {
-            console.info("getImageInfo failed with error:" + err);
+            console.error("getImageInfo failed with error: " + err);
         });
-    } else {
-        console.info("get image failed with error");
     }
 }
 ```
@@ -281,10 +291,10 @@ async function example() {
     const context = getContext(this);
     let media = mediaLibrary.getMediaLibrary(context);
     const path = await media.getPublicDirectory(DIR_DOCUMENTS);
-    media.createAsset(mediaType, "testFile.text", path).then ((asset) => {
+    media.createAsset(mediaType, "testFile.text", path).then((asset) => {
         console.info("createAsset successfully:"+ JSON.stringify(asset));
     }).catch((err) => {
-        console.info("createAsset failed with error:"+ err);
+        console.error("createAsset failed with error: " + err);
     });
 }
 ```
@@ -321,15 +331,15 @@ async function example() {
     let media = mediaLibrary.getMediaLibrary(context);
     const fetchFileResult = await media.getFileAssets(option);
     let asset = await fetchFileResult.getFirstObject();
-    if (asset == undefined) {
-      console.error('asset not exist');
-      return;
+    if (asset === undefined) {
+        console.error('asset not exist');
+        return;
     }
     //回调为空
     asset.trash(true).then(() => {
         console.info("trash successfully");
     }).catch((err) => {
-        console.info("trash failed with error: " + err);
+        console.error("trash failed with error: " + err);
     });
 }
 ```
@@ -347,7 +357,7 @@ async function example() {
 - 获取媒体库mediaLibrary实例。
 - 申请媒体库读写权限“ohos.permission.WRITE_MEDIA”。
 
-下面以将文件检索结果中第一个文件重命名为“newtitle.text”为例。
+下面以将文件检索结果中第一个文件重命名为“newImage.jpg”为例。
 
 **开发步骤**
 
@@ -360,7 +370,7 @@ async function example() {
 ```ts
 async function example() {
     let fileKeyObj = mediaLibrary.FileKey;
-    let fileType = mediaLibrary.MediaType.FILE;
+    let fileType = mediaLibrary.MediaType.IMAGE;
     let option = {
         selections: fileKeyObj.MEDIA_TYPE + '= ?',
         selectionArgs: [fileType.toString()],
@@ -369,18 +379,18 @@ async function example() {
     let media = mediaLibrary.getMediaLibrary(context);
     const fetchFileResult = await media.getFileAssets(option);
     let asset = await fetchFileResult.getFirstObject();
-    if (asset == undefined) {
-      console.error('asset not exist');
-      return;
+    if (asset === undefined) {
+        console.error('asset not exist');
+        return;
     }
     asset.displayName = 'newImage.jpg';
     //回调为空
     asset.commitModify((err) => {
-       if (err) {
-           console.error('fileRename Failed ');
-           return;
-       }
-       console.log('fileRename successful.');
+        if (err) {
+            console.error('fileRename Failed ');
+            return;
+        }
+        console.info('fileRename successful.');
     });
 }
 ```