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As the control core of the modern office space, such as multimedia conference room and multimedia exhibition hall, the smart center control computer is very important, it is almost based on RS485 bus in current market. This will result in the worse real-time performance, the lower error-tolerant rate, the more deficient function and the higher price. In according with this situation, a smart center control computer system is introduced, which is based on CAN Bus network, with the embedded system as the master device, and the variant function modules as slave devices. Through the priority arbitration mechanism of CAN Bus controller, and the data packet communication protocol which contains error feedback, the real-time and accurate control to various controlled equipments is realized. So, the hardware circuit of the control system is simple, the function module is easy to expand and the cost is lower. According to the test, the design of the smart center control computer is good enough to meet the requirements of industry standards, and has a broad applications.