A spacial transient optical signal location system based on optical location method is designed. This system cooperates with energy detection system. After energy detection system detects the target signal,the location system gets the target image and stores the coordinates of target pixels. Then DSP calculates the centroid of target signal and sends the results to lower computer. The composition of system,the design method of modules,and the test results are given in this paper. Experiments show that this location system is accurate and feasible.