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In order to achieve intelligent control of many sets of imaging systems, this paper presents an imaging control system based on CAN bus,and introduces how to solve some problems of key technology on the design.Firstly, hardware design principle of high reliability thermal back-up CAN bus control system is given; Then, logic control principle and method of SJA1000 chip based on FPGA is introduced; Finally, combined with the actual engineering project the working process of the control system is expounded.Experimental results proved that this system has advantages of stable and reliable, which can achieve intelligent control of more than one imaging system.The concept and method of this design is versatile, so the system has good universality.