This book introduces the theories and methods of laser coherent detection in the field of high-performance target detection. It includes five chapters, including the theoretical foundation of laser coherent detection, laser coherent detection of atmospheric disturbances, the chirped amplitude-modulated (AM) laser coherent detection of range and velocity, laser coherent detection based on the micro-Doppler effect, and laser coherent detection of synthetic aperture lidars (SALs). The book offers an invaluable resource for researchers, especially those who are engaged in fields including laser imaging, photoelectric information acquisition, target detection and recognition, and laser technology. Additionally, it can be used as a reference book for professional teachers, advanced undergraduates, and postgraduates of relevant majors.