At present, there are two main types of library access control, but one is magnetic access control, not infrared alarm. The alarm is mainly realized by checking the magnetic stripe sandwiched in the book. The magnetic stripe that has been checked out will be demagnetized, and there will be no alarm after the access control. On the contrary, the alarm is RFID access control. By checking whether the information recorded on the RFID chip has been lent out for alarm, it is easy to use RFID and magnetic stripe to alarm, put on shelves, check and select independently.