The present invention discloses a stereo vision system with automatic focusing controlled based on human biometrics, wherein the pupil tracking technology, the brain awareness control technology, the gesture recognition technology, the voice control technology, and the keyboard are used to control movement of a camera system and to implement functions such as photographing, video shooting, and navigation. The camera system, a person, a microcomputer processing module form a closed loop system, achieving the advantages of fast response and high reliability. Adjustable liquid lens imaging is applied to smart glasses, so that a wider scene can be clearly seen, and a telescopic capability is achieved; and dual cameras are applied to the smart glasses, so that depth information is added, an obtained image provides a stereoscopic visual sense, and a good visual experience is provided for users.