Photoelectric tracking system is an integrated system integration device of optical, mechanical, electrical, control and signal processing, which uses photoelectric detector devices as sensitive elements and uses electromechanical control to keep the detector's visual axis stable, thus realizing the target capture, tracking, aiming and stabilization functions of the tracking device. Target identification and automatic tracking technology, photoelectric tracking servo control, control technology application, mechanical structure design, signal processing methods are the key to determine the advantages and disadvantages of photoelectric tracking system.