The uterus is the cradle of mankind, and as you can imagine, the uterus is indispensable in the process of human conception. Uterine infertility factors have been an important cause of infertility. Hysteroscopy detects uterine cavity pathologies that may cause infertility through direct observation of the uterine cavity and, if necessary, restores the normal structure of the uterine cavity by performing simultaneous surgeries under the supervision of the lens. Abnormalities in the uterine cavity leading to infertility are mainly due to: (1) due to the sperm and egg combination or bedding affected, such as larger uterine body or cervical submucosal fibroids, adenomyomas, tubal openings, fibroids or polyps, uterine cavity or cervical endocervical adhesion, etc.; (2) affecting the implantation of fertilized eggs, bedding resulting in infertility or recurrent miscarriages of the common causes of uterine longitudinal septum, uterine adhesions, multiple endometrial polyps or endometrial tuberculosis Calcified lesions, etc. Hysteroscopy can objectively and comprehensively observe the cervix, uterine cavity, uterine horn, tubal openings, and accurately understand the location, scope and degree of lesions, and it can be safer under the supervision of laparoscopy to carry out tubal fluids and pressurization, separation of uterine adhesions, endometrial polyp electrocutaneous resection, uterine fibroids electrocutaneous resection, uterine longitudinal resection and so on, so that timely solution to the uterine cavity factors that cause infertility. The examination can be performed by applying a rigid body mirror with a diameter of about 4-5mm or even a thinner flexible body mirror, which can minimize the discomfort during the examination, and most of the patients only have slight discomfort and can be operated without anesthesia. If the lesions in the uterine cavity are found to be mild, such as small endometrial polyps, mild uterine adhesions, uterine foreign bodies, etc., the disease can be cured at the same time by operating through the orifice of the scope. If the examination finds that the uterine cavity lesions are more serious such as large submucous fibroids, uterine septum, severe uterine adhesions, etc., then it is necessary to operate under anesthesia through the uterine cavity electrosurgery with a diameter of about 10mm, which is safe and convenient, and it is a model of gynecological minimally invasive surgery. Hysteroscopy has been the first choice for diagnosis and treatment of uterine cavity lesions leading to infertility, and its joint application with laparoscopy has been the gold standard for infertility diagnosis and treatment. It is believed that hysteroscopy will play a greater role in the diagnosis and treatment of infertility and bring more help to infertile women.