diff --git a/runtime/main/extend/systemplugin/napi/ohos_request.js b/runtime/main/extend/systemplugin/napi/ohos_request.js
index f82bdcc6..c6bd6927 100644
--- a/runtime/main/extend/systemplugin/napi/ohos_request.js
+++ b/runtime/main/extend/systemplugin/napi/ohos_request.js
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Huawei Device Co., Ltd.
+ * Copyright (C) 2021-2022 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -13,38 +13,250 @@
  * limitations under the License.
  */
 
-import { hasComplete } from "../utils"
+import { paramMock } from "../utils"
 
 export function mockRequest() {
-  const uploadResponseMock = {
-    code: "[PC Preview]: unknow code",
-    data: "[PC Preview]: unknow data",
-    headers: "[PC Preview]: unknow headers"
-  }
-  const downloadResponse = {
-    token: "[PC Preview]: unknow token"
-  }
-  const onDownloadCompleteMock = {
-    uri: "[PC Preview]: unknow uri"
-  }
+  const DownloadConfig = {
+    url: "[PC Preview] unknow uri",
+    herder: "[PC Preview] unknow herder",
+    enableMetered: "[PC Preview] unknow enableMetered",
+    enableRoaming: "[PC Preview] unknow enableRoaming",
+    description: "[PC Preview] unknow description",
+    networkType: "[PC Preview] unknow networkType",
+    filePath: "[PC Preview] unknow filePath",
+    title: "[PC Preview] unknow title",
+  };
+
+  const DownloadInfo = {
+    description: "[PC Preview] unknow description",
+    downloadedBytes: "[PC Preview] unknow downloadedBytes",
+    downloadId: "[PC Preview] unknow downloadId",
+    failedReason: "[PC Preview] unknow failedReason",
+    fileName: "[PC Preview] unknow fileName",
+    filePath: "[PC Preview] unknow filePath",
+    pausedReason: "[PC Preview] unknow pausedReason",
+    status: "[PC Preview] unknow status",
+    targetURI: "[PC Preview] unknow targetURI",
+    downloadTitle: "[PC Preview] unknow downloadTitle",
+    downloadTotalBytes: "[PC Preview] unknow downloadTotalBytes",
+  };
+
+  const DownloadTask = {
+    on: function (...args) {
+      console.warn("downloadTask.on interface mocked in the Previewer. How this interface works on the" +
+        " Previewer may be different from that on a real device.");
+      const len = args.length
+      if (typeof args[len - 1] === 'function') {
+        if (args[0] == 'progress') {
+          const receivedSize = "[PC Preview] unknow receivedSize"
+          const totalSize = "[PC Preview] unknow totalSize"
+          args[len - 1].call(this, receivedSize, totalSize)
+        } else if (args[0] == 'complete' | 'pause' | 'remove') {
+          args[len - 1].call(this)
+        } else if (args[0] == 'fail') {
+          const err = "[PC Preview] unknow err"
+          args[len - 1].call(this, err)
+        }
+      }
+    },
+
+    off: function (...args) {
+      console.warn("downloadTask.off interface mocked in the Previewer. How this interface works on the" +
+        " Previewer may be different from that on a real device.");
+      const len = args.length
+      if (typeof args[len - 1] === 'function') {
+        if (args[0] == 'progress') {
+          const receivedSize = "[PC Preview] unknow receivedSize"
+          const totalSize = "[PC Preview] unknow totalSize"
+          args[len - 1].call(this, receivedSize, totalSize)
+        } else if (args[0] == 'complete' | 'pause' | 'remove') {
+          args[len - 1].call(this)
+        } else if (args[0] == 'fail') {
+          const err = "[PC Preview]: unknow err"
+          args[len - 1].call(this, err)
+        }
+      }
+    },
+
+    remove: function (...args) {
+      console.warn("downloadTask.remove interface mocked in the Previewer. How this interface works on the" +
+        " Previewer may be different from that on a real device.")
+      const len = args.length
+      if (typeof args[len - 1] === 'function') {
+        args[len - 1].call(this, paramMock.businessErrorMock, paramMock.paramBooleanMock)
+      } else {
+        return new Promise((resolve) => {
+          resolve(paramMock.paramBooleanMock)
+        })
+      }
+    },
+
+    pause: function (...args) {
+      console.warn("downloadTask.pause interface mocked in the Previewer. How this interface works on the" +
+        " Previewer may be different from that on a real device.")
+      const len = args.length
+      if (typeof args[len - 1] === 'function') {
+        args[len - 1].call(this, paramMock.businessErrorMock)
+      } else {
+        return new Promise((resolve) => {
+          resolve()
+        })
+      }
+    },
+
+    resume: function (...args) {
+      console.warn("downloadTask.resume interface mocked in the Previewer. How this interface works on the" +
+        " Previewer may be different from that on a real device.")
+      const len = args.length
+      if (typeof args[len - 1] === 'function') {
+        args[len - 1].call(this, paramMock.businessErrorMock)
+      } else {
+        return new Promise((resolve) => {
+          resolve()
+        })
+      }
+    },
+
+    query: function (...args) {
+      console.warn("downloadTask.query interface mocked in the Previewer. How this interface works on the" +
+        " Previewer may be different from that on a real device.")
+      const len = args.length
+      if (typeof args[len - 1] === 'function') {
+        args[len - 1].call(this, paramMock.businessErrorMock, downloadInfoMock)
+      } else {
+        return new Promise((resolve) => {
+          resolve(downloadInfoMock)
+        })
+      }
+    },
+
+    queryMimeType: function (...args) {
+      console.warn("downloadTask.queryMimeType interface mocked in the Previewer. How this interface works on the" +
+        " Previewer may be different from that on a real device.")
+      const len = args.length
+      if (typeof args[len - 1] === 'function') {
+        args[len - 1].call(this, paramMock.businessErrorMock, paramMock.paramStringMock)
+      } else {
+        return new Promise((resolve) => {
+          resolve(paramMock.paramStringMock)
+        })
+      }
+    },
+  };
+
+  const File = {
+    filename: "[PC Preview] unknow filename",
+    name: "[PC Preview] unknow name",
+    uri: "[PC Preview] unknow uri",
+    type: "[PC Preview] unknow type",
+  };
+
+  const RequestData = {
+    name: "[PC Preview] unknow name",
+    value: "[PC Preview] unknow value",
+  };
+
+  const UploadConfig = {
+    url: "[PC Preview] unknow uri",
+    herder: "[PC Preview] unknow herder",
+    method: "[PC Preview] unknow method",
+    files: [File],
+    data: [RequestData],
+  };
+
+  const UploadTask = {
+    on: function (...args) {
+      console.warn("uploadTask.on interface mocked in the Previewer. How this interface works on the" +
+        " Previewer may be different from that on a real device.");
+      const len = args.length
+      if (typeof args[len - 1] === 'function') {
+        if (args[0] == 'progress') {
+          const uploadedSize = "[PC Preview] unknow receivedSize"
+          const totalSize = "[PC Preview] unknow totalSize"
+          args[len - 1].call(this, uploadedSize, totalSize)
+        } else if (args[0] == 'headerReceive') {
+          const header = "[PC Preview] unknow header"
+          args[len - 1].call(this, header)
+        }
+      }
+    },
+
+    off: function (...args) {
+      console.warn("uploadTask.off interface mocked in the Previewer. How this interface works on the" +
+        " Previewer may be different from that on a real device.");
+      const len = args.length
+      if (typeof args[len - 1] === 'function') {
+        if (args[0] == 'progress') {
+          const uploadedSize = "[PC Preview] unknow receivedSize"
+          const totalSize = "[PC Preview] unknow totalSize"
+          args[len - 1].call(this, uploadedSize, totalSize)
+        } else if (args[0] == 'headerReceive') {
+          const header = "[PC Preview] unknow header"
+          args[len - 1].call(this, header)
+        }
+      }
+    },
+
+    remove: function (...args) {
+      console.warn("uploadTask.remove interface mocked in the Previewer. How this interface works on the" +
+        " Previewer may be different from that on a real device.")
+      const len = args.length
+      if (typeof args[len - 1] === 'function') {
+        args[len - 1].call(this, paramMock.businessErrorMock, paramMock.paramBooleanMock)
+      } else {
+        return new Promise((resolve) => {
+          resolve(paramMock.paramBooleanMock)
+        })
+      }
+    },
+  };
+
   const request = {
-    upload: function (...args) {
-      console.warn("system.request.upload interface mocked in the Previewer. How this interface works on the" +
-        " Previewer may be different from that on a real device.")
-      args[0].success(uploadResponseMock)
-      hasComplete(args[0].complete)
-    },
+    NETWORK_MOBILE: '[PC preview] unknow NETWORK_MOBILE',
+    NETWORK_WIFI: '[PC preview] unknow NETWORK_WIFI',
+    ERROR_CANNOT_RESUME: '[PC preview] unknow ERROR_CANNOT_RESUME',
+    ERROR_DEVICE_NOT_FOUND: '[PC preview] unknow ERROR_DEVICE_NOT_FOUND',
+    ERROR_FILE_ALREADY_EXISTS: '[PC preview] unknow ERROR_FILE_ALREADY_EXISTS',
+    ERROR_FILE_ERROR: '[PC preview] unknow ERROR_FILE_ERROR',
+    ERROR_HTTP_DATA_ERROR: '[PC preview] unknow ERROR_HTTP_DATA_ERROR',
+    ERROR_INSUFFICIENT_SPACE: '[PC preview] unknow ERROR_INSUFFICIENT_SPACE',
+    ERROR_TOO_MANY_REDIRECTS: '[PC preview] unknow ERROR_TOO_MANY_REDIRECTS',
+    ERROR_UNHANDLED_HTTP_CODE: '[PC preview] unknow ERROR_UNHANDLED_HTTP_CODE',
+    ERROR_UNKNOWN: '[PC preview] unknow ERROR_UNKNOWN',
+    PAUSED_QUEUED_FOR_WIFI: '[PC preview] unknow PAUSED_QUEUED_FOR_WIFI',
+    PAUSED_UNKNOWN: '[PC preview] unknow PAUSED_UNKNOWN',
+    PAUSED_WAITING_FOR_NETWORK: '[PC preview] unknow PAUSED_WAITING_FOR_NETWORK',
+    PAUSED_WAITING_TO_RETRY: '[PC preview] unknow PAUSED_WAITING_TO_RETRY',
+    SESSION_FAILED: '[PC preview] unknow SESSION_FAILED',
+    SESSION_PAUSED: '[PC preview] unknow SESSION_PAUSED',
+    SESSION_PENDING: '[PC preview] unknow SESSION_PENDING',
+    SESSION_RUNNING: '[PC preview] unknow SESSION_RUNNING',
+    SESSION_SUCCESSFUL: '[PC preview] unknow SESSION_SUCCESSFUL',
+
     download: function (...args) {
-      console.warn("system.request.download interface mocked in the Previewer. How this interface works on the" +
+      console.warn("request.download interface mocked in the Previewer. How this interface works on the" +
         " Previewer may be different from that on a real device.")
-      args[0].success(downloadResponse)
-      hasComplete(args[0].complete)
+      const len = args.length
+        if (typeof args[len - 1] === 'function') {
+          args[len - 1].call(this, paramMock.businessErrorMock, DownloadTask)
+        } else {
+          return new Promise((resolve) => {
+            resolve(DownloadTask);
+          })
+        }
     },
-    onDownloadComplete: function (...args) {
-      console.warn("system.request.onDownloadComplete interface mocked in the Previewer. How this interface works on" +
-        " the Previewer may be different from that on a real device.")
-      args[0].success(onDownloadCompleteMock)
-      hasComplete(args[0].complete)
+
+    upload: function (...args) {
+      console.warn("request.upload interface mocked in the Previewer. How this interface works on the" +
+        " Previewer may be different from that on a real device.")
+      const len = args.length
+      if (typeof args[len - 1] === 'function') {
+        args[len - 1].call(this, paramMock.businessErrorMock, UploadTask)
+      } else {
+        return new Promise((resolve) => {
+          resolve(UploadTask)
+        })
+      }
     }
   }
   return request