In order to realize the tracking and detecting of spot position, an optical tracking system using two dimensional galvanometer and four quadrant detector is designed. In terms of hardware design, a signal acquisition circuit based on precision operational amplifier is designed to collect signals captured by four-quadrant detectors and achieve reliable and accurate output. In the realization of the system, according to the characteristics of the galvanometer optical tracking system, the system program structure is designed, and the spot center algorithm is combined with the hardware system. After debugging, the program structure is optimized and the spot accuracy is analyzed. The results show that the laser tracking system is able to track light spots stably through the experimental platform testing and collecting multiple sets of data.