Computer operation system, wearable device and computer operation method

The present invention discloses a computer operation system, a wearable device and a computer operation method. The wearable device comprises a touch screen, a first processing module and a first communication module. The touch screen and the first communication module are both connected to the first processing module; the wearable device enters a control mode; the touch screen displays a control interface; when a user performs operation in the control interface, the touch screen obtains an operation trajectory; the first processing module converts the operation trajectory into an operation instruction, and sends the operation instruction to a computer through the first communication module; and the computer analyzes the operation instruction, and performs corresponding operation according to the analyzed operation instruction. According to the system and the method, the computer can be operated by using the wearable device, thereby improving user experience.