The article introduces three types of laser-guided weapon guidance systems: semi-active laser guidance,laser beam riding guidance and laser active imaging guidance.Analysis is made to the working principle of the three kinds of laser guidance systems and the performance of the laser-guided weapons.Based on which,the advantages and disadvantages of the three kinds of laser guidance systems are presented, with focus on the laser active imaging guidance and its development.The tendency of laser-guided weapons in the future is pointed out in the end.