Image signal switching apparatus and image signal switching method thereof

The invention relates to the image signal processing field, especially to an image signal switching apparatus and an image signal switching method thereof. The image signal switching apparatus comprises a video signal switching module, a microprocessor module, and a power management module. The video signal switching module is used for receiving or outputting a video signal outputted by imaging equipment and is in communication connection with the microprocessor module, and outputs a video signal to a work station selectively according to an instruction of the microprocessor module. The microprocessor module is used for managing all modules of the image signal switching apparatus. And the power management module is used for providing a power supply needed by working of the image signal switching apparatus. The image signal switching apparatus can receive high-definition video signals and control signals of a plurality of electronic dermatoscopes and transmits the video signal and control signal of one electronic dermatoscope selectively to the work station according to the request from the electronic dermatoscope.