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Aiming at the problems of low effective utilization rate and frequent occupancy of seats in the traditional unattended seat mode, this paper proposes a design scheme of Intelligent Library seat management system based on LoRa protocol. The perception layer of the system deploys seat management nodes. LoRa network uses star-shaped topology structure to build a low-power Wide Area Internet of Things Intelligent Library seat management system. The main points of the design are discussed in detail from the aspects of system overall design, system network architecture design, system function design, software and hardware design of LoRa seat management node and LoRa base station, and communication protocol design. The function and performance of the system are tested. The results show that the seat management system of Intelligent Library Based on LoRa is better than the traditional seat management mode without seat management. Bit efficiency is higher, the time for readers to find seats is obviously shortened, and the occupancy of seats has also been improved, which is very suitable for the promotion and application of seat management in libraries.