An eye movement traces authentication system comprises an image capturing device, a display device, and a control unit. The image capturing device is for capturing a user's image. The display device is for providing a display interface for the user to watch. The control unit includes a facial feature recognition module or hand feature recognition module, an eye-movement analyzing module, an eye movement traces unlocking module, and a volitional confirmation module. The eye movement traces authentication system uses the user's facial features to confirm the user's identity and determines the user's watching direction and eye movement, by recording user's eye movement traces from the user's watching direction to verify the user's identity and by analyzing the user's eye movement to confirm, according to the user's eye movement, whether the user is operating volitionally.