I'm working on my game and every time I make changes to it I send the game to my mobile device to debug it.
I want to know how I can directly debug my game using an Android device instead of the MonoDevelop editor?
Your question is pretty unclear. If you want to use your Android device to control the game, you can set up a connection with Unity and your device through USB, using the Unity Remote app: https://play.google.com/store/apps/details?id=com.unity3d.genericremote&hl=bg
That way you don't have to wait for it to build and push to your device for every small change in your game.