The access control system, as the name suggests, is a system for controlling entrance and exit routes, and it is based on the traditional door lock. Common access control systems include: password recognition access control systems, card recognition access control systems, biometric access control systems, etc. It is suitable for all kinds of machine departments, such as banks, hotels, machine rooms, armories, machine rooms, office rooms, intelligent communities, factories, etc. In the rapid development of digital technology network technology today access control technology has been developed rapidly. Access control systems have long gone beyond simple doorway and key management, it has gradually developed into a complete access management system. It plays a huge role in administrative management such as work environment safety and personnel attendance management.