The present invention provides an apparatus and a method for switching and converting video signals, wherein the method majorly includes the steps of: receiving N number of DisplayPort video signals and N number of USB video signals by N number of USB Type-C connection interfaces which are in compliance with a DisplayPort Alternate Mode specification, and N is a natural number greater than or equal to 2; and selecting one out of the DisplayPort video signals and one out of the USB video signals; converting the selected DisplayPort video signal and the selected USB video signal into a DisplayPort video signal or a HDMI video signal; transmitting the converted DisplayPort video signal or HDMI video signal to Q number of display devices, and Q is a natural number greater than or equal to 2.