Hysteroscopic surgery refers to minimally invasive surgery with hysteroscopy. Hysteroscopy is an optical instrument for observation, diagnosis and treatment of uterine cavity. Hysteroscopy can be divided into diagnostic type and surgical type, as well as soft type and hard type. Soft diagnostic hysteroscope is made of advanced optical fiber, with small diameter and can be bent at will. It is easy to observe and diagnose the whole uterine cavity, and the examination process is fast (about 2~5 minutes), without pain and damage to the uterus.