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According to Beijing planetarium 3D Motion Theater Automatic Control Systems project designed and implemented a 3D dynamic cinema automatic control system.This system consists of main cabinet, OCC operator panel and control box.Through emergency stop chain and sport license chain together to achieve the system security module.System also achieve mutual communication between control devices using the Ethernet, RS-232,RS485. Experiments show that the layout of the hardware is reasonable,The signal delay between distributed PLC architecture and iFix control configuration software in 50ms or less and the update cycle of local database is 0.5s so that able to achieve real-time control of various types of equipment in the 3D cinema.The 72 screenings within two weeks show that the correct rate of system up to 100%.