AI based face recognition technology breaks the boundary of traditional limitation as it does not just the biometric feature of face; it can combine with shape of body from any of angle, with/without cover on face, gesture. All these features could be assembly into multiple layers and become template and indexes in database. It could be lookup and comparing on parallel computing platform and response in time. Along with self-learning mechanism as part of AI Engine’s feature. The system will become even smarter after deploy in the field. It could act as a real intelligent guardian to watch and screening all people around.