Multi-Tag Detection--Capable of simultaneously detecting one or more tags, reducing book theft rates. Cost reduction and Efficiency Improvement--Reduces the need for excessive security personnel, lowering labor costs and improving the borrowing environment. Two-Way Visitor Flow Statistics--Supports two-way statistics of people entering and exiting the library, allowing librarians to understand visitor flow. Dual-Mode Operation--Supports online and offline working modes, stable and reliable, easy to use, and can be used continuously 24 hours a day. Sensitivity--Utilizes RFID technology with alarm indicator lights, providing sensitive response and reliable security. Linkage--Can be linked with access control systems for door opening and closing, and can monitor and implement alarm capture functions. Expandability--Real-time offline storage of data such as visitor flow, alarm counts, system faults, and system environment for each channel, facilitating offline and online data upload and analysis to a PC. Infrared Trigger--Supports infrared trigger activation; detection begins when a reader is detected, and it enters standby mode when no one is passing through, achieving energy saving and reducing the possibility of false alarms.