The invention discloses a wearable face recognition device and a realization method; the wearable face recognition device comprises a head-mounted unit and a hand-held unit; the head-mounted unit is a processing chip with a camera, placed in an army cap, and used for image acquisition, face recognition, image data transmission and information feedback; the hand-held unit is an android smart phone, used for controlling the head-mounted unit, and receiving and displaying image data and feedback information from the head-mounted unit. The Bluetooth communication technology is employed to realize short distance real time communication and image transmission between the head-mounted unit and the hand-held unit; the head-mounted unit is used for image acquisition, face recognition and image data transmission; the hand-held unit is used for controlling the head-mounted unit and displaying feedback information thereof; the two units have clear division of work.