Mouse system capable of controlling projection demonstration based on laser pen

The invention relates to a mouse control system, in particular to a novel mouse control system capable of directly controlling a computer through a laser pen, which is composed of a laser pen module, a position detection module and a universal serial bus (USB) wireless receiving module. The laser pen module and the position detection module can respectively feed back key switch state information and mouse position information to the USB wireless receiving module. Thus, the laser pen is led to directly control the computer, and restrain of an ordinary mouse in projection demonstration is completely avoided.