Problem with touch and ui button

Just like the image above, we have a model and a canvas in front of it. It have collider at foots, and i need onclick event in the button also. What i want is the gameobject no action when user click button, but now it's hard to click the button.

Here is my code below:

 if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began)
         {
             EventSystem es = EventSystem.current;
             if (es.IsPointerOverGameObject(Input.GetTouch(0).fingerId) && es.currentSelectedGameObject != null)
             {
                 Debug.Log("Handle touch === ");
                 HandleTouchEvent();
             }
         }

Does someone has any ideas?