Hysteroscopy is not the same as hysteroscopic surgery because one is a method of checking the disease and the other is a method of treating the disease. 1. Hysteroscopy refers to the application of dilatation of the uterine cavity with dilatation medium and observation of physiological and pathological changes in the cervical canal, endocervical os, uterine cavity and fallopian tube openings by means of a light-guided glass fiber speculum inserted into the uterine cavity. If there is abnormal uterine bleeding, suspected uterine adhesions, unexplained infertility or repeated miscarriages, etc., hysteroscopy may be needed. 2. Hysteroscopic surgery refers to a method of disease treatment. If a woman has endometrial polyps, submucosal fibroids or interstitial fibroids growing toward the uterine cavity, uterine adhesions, longitudinal uterine septum, incarcerated birth control device, or foreign body in the uterine cavity, etc., she may need to undergo hysteroscopic surgery, which is more complicated and time-consuming than the examination operation.