In addition to computer graphics technology generated by visual perception, there are auditory, tactile, force, movement and other perception, and even including the sense of smell and taste, also known as multi-perception. Natural skill refers to the person’s head rotation, eyes, gestures, or other human behavior, by the computer to deal with the action of the participants to adapt to the data, and the user’s input to make real-time response, and was fed back to the user's facial features.