Through introducing CMOS image sensor LUPA-1300-2,the application of multiple slope integration function in the spatial transient light detection system is investigated.Based on ACTEL corporation′s Flash FPGA APA600 as the hardware carrier,the drive and control for the sensor are analyzed and designed.The experiment results show that the function is able to detect the instantaneous changes around the spatial transient optical point,and enhance system′s reliability and capability of information collection.