diff --git a/services/native/file_access_service/src/file_access_service.cpp b/services/native/file_access_service/src/file_access_service.cpp
index ad336acc50d9232548984c06b5895dff506c372e..88eeff98a6492c20a1cb72a3c9791d6fbaca96a2 100644
--- a/services/native/file_access_service/src/file_access_service.cpp
+++ b/services/native/file_access_service/src/file_access_service.cpp
@@ -127,9 +127,11 @@ int32_t FileAccessService::RegisterNotify(Uri uri, bool notifyForDescendants, co
         // this is new callback, save this context
         obsContext->Ref();
         code = obsManager_.save(obsContext);
+        HILOG_DEBUG("this is new callback, save this context uri =%{public}s", uri.ToString().c_str());
     } else {
         // this callback is already in manager, add ref.
         obsManager_.get(code)->Ref();
+        HILOG_DEBUG("this callback is already in manager, add ref uri =%{public}s", uri.ToString().c_str());
     }
     string uriStr = uri.ToString();
     lock_guard<mutex> lock(nodeMutex_);
@@ -261,6 +263,7 @@ int32_t FileAccessService::UnregisterNotify(Uri uri, const sptr<IFileAccessObser
     }
     obsNode->obsCodeList_.erase(haveCodeIter);
     obsManager_.get(code)->UnRef();
+    HILOG_DEBUG("unRef uri: %{public}s", uri.ToString().c_str());
     // node has other observers, do not need remove.
     if (obsNode->obsCodeList_.size() != 0) {
         HILOG_DEBUG("Has code do not stopWatcher");
@@ -269,6 +272,7 @@ int32_t FileAccessService::UnregisterNotify(Uri uri, const sptr<IFileAccessObser
     }
     // if data refcount is invalid, release this code.
     if (!obsManager_.get(code)->IsValid()) {
+        HILOG_DEBUG("release this code uri: %{public}s", uri.ToString().c_str());
         obsManager_.release(code);
     }
     RemoveRelations(uriStr, obsNode);
diff --git a/test/unittest/external_notify_test.cpp b/test/unittest/external_notify_test.cpp
index 73e9bbde7966e8dbdaf0f8b933de128278a03b4e..f13ed46f12eb0962d9033b4287276ccf3a208dfc 100644
--- a/test/unittest/external_notify_test.cpp
+++ b/test/unittest/external_notify_test.cpp
@@ -497,6 +497,127 @@ HWTEST_F(FileExtensionNotifyTest, external_file_access_notify_0003, testing::ext
     GTEST_LOG_(INFO) << "FileExtensionNotifyTest-end external_file_access_notify_0003";
 }
 
+/**
+ * @tc.number: user_file_service_external_file_access_notify_0004
+ * @tc.name: external_file_access_notify_0004
+ * @tc.desc: Test function of RegisterNotify and UnregisterNotify interface for SUCCESS.
+ * @tc.size: MEDIUM
+ * @tc.type: FUNC
+ * @tc.level Level 1
+ * @tc.require: SR000H0386
+ */
+HWTEST_F(FileExtensionNotifyTest, external_file_access_notify_0004, testing::ext::TestSize.Level1)
+{
+    GTEST_LOG_(INFO) << "FileExtensionNotifyTest-begin external_file_access_notify_0004";
+    try {
+        vector<RootInfo> info;
+        int result = g_fah->GetRoots(info);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        bool notifyForDescendants = true;
+        sptr<IFileAccessObserver> myObserver1 = new (std::nothrow) MyObserver();
+        sptr<IFileAccessObserver> myObserver2 = new (std::nothrow) MyObserver();
+        Uri parentUri(info[1].uri);
+        Uri newDirUriTest1("");
+        result = g_fah->Mkdir(parentUri, "uri_dir14", newDirUriTest1);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        Uri newDirUriTest2("");
+        result = g_fah->Mkdir(parentUri, "uri_dir24", newDirUriTest2);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        Uri newDirUriTest3("");
+        result = g_fah->Mkdir(parentUri, "uri_dir34", newDirUriTest3);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        Uri newFileUri1("");
+        result = g_fah->CreateFile(parentUri, "uri_file14", newFileUri1);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        Uri newFileUri2("");
+        result = g_fah->CreateFile(parentUri, "uri_file24", newFileUri2);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        Uri newFileUri3("");
+        result = g_fah->CreateFile(parentUri, "uri_file34", newFileUri3);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        result = g_fah->RegisterNotify(newDirUriTest1, notifyForDescendants, myObserver1);
+        EXPECT_GE(result, OHOS::FileAccessFwk::ERR_OK);
+        result = g_fah->RegisterNotify(newDirUriTest2, notifyForDescendants, myObserver1);
+        EXPECT_GE(result, OHOS::FileAccessFwk::ERR_OK);
+        result = g_fah->RegisterNotify(newDirUriTest3, notifyForDescendants, myObserver1);
+        EXPECT_GE(result, OHOS::FileAccessFwk::ERR_OK);
+        result = g_fah->RegisterNotify(newFileUri1, notifyForDescendants, myObserver2);
+        EXPECT_GE(result, OHOS::FileAccessFwk::ERR_OK);
+        result = g_fah->RegisterNotify(newFileUri2, notifyForDescendants, myObserver2);
+        EXPECT_GE(result, OHOS::FileAccessFwk::ERR_OK);
+        result = g_fah->RegisterNotify(newFileUri3, notifyForDescendants, myObserver2);
+        EXPECT_GE(result, OHOS::FileAccessFwk::ERR_OK);
+
+        Uri renameDirUri1("");
+        result = g_fah->Rename(newDirUriTest1, "renameDir1", renameDirUri1);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        usleep(SLEEP_TIME * 2);
+        EXPECT_EQ(g_notifyEvent, MOVED_SELF);
+        EXPECT_EQ(g_notifyUri, newDirUriTest1.ToString());
+        Uri renameDirUri2("");
+        result = g_fah->Rename(newDirUriTest2, "renameDir2", renameDirUri2);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        usleep(SLEEP_TIME);
+        EXPECT_EQ(g_notifyEvent, MOVED_SELF);
+        EXPECT_EQ(g_notifyUri, newDirUriTest2.ToString());
+        Uri renameDirUri3("");
+        result = g_fah->Rename(newDirUriTest3, "renameDir3", renameDirUri3);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        usleep(SLEEP_TIME);
+        EXPECT_EQ(g_notifyEvent, MOVED_SELF);
+        EXPECT_EQ(g_notifyUri, newDirUriTest3.ToString());
+
+        Uri renameFileUri1("");
+        result = g_fah->Rename(newFileUri1, "renamefile1", renameFileUri1);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        usleep(SLEEP_TIME * 2);
+        EXPECT_EQ(g_notifyEvent, MOVED_SELF);
+        Uri renameFileUri2("");
+        result = g_fah->Rename(newFileUri2, "renamefile2", renameFileUri2);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        usleep(SLEEP_TIME);
+        EXPECT_EQ(g_notifyEvent, MOVED_SELF);
+        EXPECT_EQ(g_notifyUri, newFileUri2.ToString());
+        Uri renameFileUri3("");
+        result = g_fah->Rename(newFileUri3, "renamefile3", renameFileUri3);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        usleep(SLEEP_TIME);
+        EXPECT_EQ(g_notifyEvent, MOVED_SELF);
+        EXPECT_EQ(g_notifyUri, newFileUri3.ToString());
+
+        sleep(2);
+        result = g_fah->UnregisterNotify(newDirUriTest1, myObserver1);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        result = g_fah->UnregisterNotify(newDirUriTest2, myObserver1);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        result = g_fah->UnregisterNotify(newDirUriTest3, myObserver1);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        result = g_fah->UnregisterNotify(newFileUri1, myObserver2);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        result = g_fah->UnregisterNotify(newFileUri2, myObserver2);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        result = g_fah->UnregisterNotify(newFileUri3, myObserver2);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+
+        result = g_fah->Delete(renameDirUri1);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        result = g_fah->Delete(renameDirUri2);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        result = g_fah->Delete(renameDirUri3);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        result = g_fah->Delete(renameFileUri1);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        result = g_fah->Delete(renameFileUri2);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+        result = g_fah->Delete(renameFileUri3);
+        EXPECT_EQ(result, OHOS::FileAccessFwk::ERR_OK);
+
+    } catch (...) {
+        GTEST_LOG_(ERROR) << "external_file_access_notify_0004 occurs an exception.";
+    }
+    GTEST_LOG_(INFO) << "FileExtensionNotifyTest-end external_file_access_notify_0004";
+}
+
 /**
  * @tc.number: user_file_service_external_file_access_notify_0005
  * @tc.name: external_file_access_notify_0005