Hysteroscopy is a specialized technique in the field of gynecology and its safety and efficacy are closely related to the level of the surgeon. Hysteroscopy is a technique in which instruments are inserted into the uterine cavity through the vagina and cervix, while an external light source is transmitted to the uterine cavity to observe the view inside the cavity. Hysteroscopy can be used for both examination and surgery. Hysteroscopy can be used for any intrauterine pathology or for the diagnosis and treatment of intrauterine pathology. These include: abnormal uterine bleeding (surgery is not indicated during the bleeding period), uterine occupancy (e.g. submucosal fibroids, endometrial polyps, etc.), uterine malformations (mediastinum, etc.), uterine adhesions, infertility (infertility, habitual abortion), observation of uterine and fallopian tube openings, lavage, etc., localization biopsy of suspected endometrial lesions, etc., removal of foreign bodies or embedded intrauterine devices or foreign bodies, etc. Contraindications: inflammation, massive uterine bleeding, pregnancy. Complications: uterine perforation, injury, bleeding, infection, air embolism, uterine adhesions, electrical injury, cardiac and cerebral syndrome, etc., which can be life-threatening in severe cases. Hysteroscopic surgery may seem simple, but in fact it requires a lot from the operator. Theoretically, one should know the anatomy and pathology of the uterus and be familiar with the indications, contraindications and all possible complications of hysteroscopic surgery. In practice, one should be familiar with the instruments and equipment on the one hand, and on the other hand, the operator needs to be skilled in operating techniques, etc.