The Laser Range-Resolved Doppler Imaging Radar (LRRDIR)will be a research hotspot in aerospace and national defence fields,because it has higher resolving power of time-space domain,and it is more sensitive to some characteristics information such as the range,attitude and moving state on the target.These advantages of LRRDIR will be utilized to detect the micromotion of target.The technique progress on Laser High Range-Resolved Imaging Radar（LHRR）and LRRDIR are comprehensively summarized in this paper.Some key technologies that must be solved in the course of engineering applications and theoretically model on imaging simulations are systematically analyzed and pointed out the advantages and difficult problems.The works build a research foundation for further studying LRRDIR on detecting targets.