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When the traditional control system is applied to hospital security, the operation and maintenance cost is too high, and the anti-interference ability is poor. In order to solve this problem, a new hospital intelligent security control system is researched based on Ad Hoc network. The hardware and software of the system are designed. The main control module, image acquisition and processing module, alarm module and GPRS module are designed. It is divided into four steps: system initialization, image transmission, system alarm and implementation control. Compared with the traditional system, the experimental results show that the designed system has low operation and maintenance cost, strong anti-interference ability and good control ability.