An electronic device is provided, including first and second bodies, a processing module, a touch display panel, and at least one sensing unit. The second body is rotatably connected to the first body. The processing module is disposed in the first body or the second body. The touch display panel is disposed on the second body, is coupled to the processing module, and has a main display part, and first and second display parts. The sensing unit is disposed in the first body or the second body and coupled to the processing module. When the sensing unit detects the first and second bodies are folded relative to each other, the processing module is switched to a second mode, wherein in the second mode, the main display part is activated, the first display part and the second display part are adapted to operate synchronously or operate individually.