A control method is provided. The control method is applied to an electronic device. The control method includes the following steps: detecting a virtual screen signal; allocating a virtual screen image buffer module for temporarily storing virtual screen image information according to the virtual screen signal; integrating the virtual screen image information and second screen image information into an integrated image data stream by a direct mode; outputting a first screen image data stream to a first screen of an electronic device, so that the first screen displays a first image according to the first screen image data stream; and outputting the integrated image data stream to a second screen of the electronic device, so that the second screen displays a second image according to the integrated image data stream.