diff --git a/change/react-native-windows-2019-12-12-16-22-29-instanceSettings.json b/change/react-native-windows-2019-12-12-16-22-29-instanceSettings.json
new file mode 100644
index 00000000000..a7084eebcbf
--- /dev/null
+++ b/change/react-native-windows-2019-12-12-16-22-29-instanceSettings.json
@@ -0,0 +1,8 @@
+{
+  "type": "prerelease",
+  "comment": "Fix toggle debugger setting issue with ReactApplication",
+  "packageName": "react-native-windows",
+  "email": "dida@ntdev.microsoft.com",
+  "commit": "76228b95ceccaa87cc75563083415308805f914d",
+  "date": "2019-12-13T00:22:29.280Z"
+}
\ No newline at end of file
diff --git a/vnext/Microsoft.ReactNative/ReactInstanceCreator.h b/vnext/Microsoft.ReactNative/ReactInstanceCreator.h
index 6a37c8123f2..94790d7a429 100644
--- a/vnext/Microsoft.ReactNative/ReactInstanceCreator.h
+++ b/vnext/Microsoft.ReactNative/ReactInstanceCreator.h
@@ -33,14 +33,13 @@ struct ReactInstanceCreator : react::uwp::IReactInstanceCreator {
   std::shared_ptr<react::uwp::IReactInstance> getInstance();
   void markAsNeedsReload();
 
-  // TODO: Remove this wart. AFAIK, it was only added for the
-  // Universal.SampleApp It's here because of the abstract base class.  The
-  // ReactInstanceSettings in this project has a UseWebDebugger property
-  // that should be used instead as it automatically "persists" by virtue
-  // of being attached to the ReactNativeHost.
-  void persistUseWebDebugger(bool /*useWebDebugger*/){};
-  // TODO: Remove too
-  void persistUseLiveReload(bool /*useliveReload*/){};
+  void persistUseWebDebugger(bool useWebDebugger) {
+    m_instanceSettings.UseWebDebugger(useWebDebugger);
+  };
+
+  void persistUseLiveReload(bool useliveReload) {
+    m_instanceSettings.UseLiveReload(useliveReload);
+  };
 
  private:
   Microsoft::ReactNative::ReactInstanceSettings m_instanceSettings{};