In recent years, as a newly developed discipline, precision photonics has been widely used in bio-optical imaging, nano and bio-optical materials, optical microscopy, medical beauty and rejuvenation, and other disciplines. Especially in the field of medicine and life science has played its unique role. This paper summarizes the important role of optical microscopy in human life and health, aiming at promoting the development of photonics technology, health, medicine, and life science.