Hysteroscopy is an emerging minimally invasive gynecological treatment technique, which is essentially a fiberoptic endoscope consisting of a hysteroscope, energy system, light source system, perfusion system and imaging system. The main uses of hysteroscopy: Hysteroscopy not only determines the site, size, appearance and scope of the lesion, but also provides a detailed observation of the tissue structure on the surface of the lesion, and removes or scrapes the uterus under direct vision, which greatly improves the accuracy of diagnosis of diseases in the uterine cavity and updates, develops and makes up for the shortcomings of traditional treatment methods. For most patients who are suitable for diagnostic scraping, it is more reasonable and effective to perform hysteroscopy first to clarify the site of the lesion and then biopsy or scraping. Hysteroscopic surgery can diagnose and treat a variety of diseases, such as dysfunctional uterine bleeding, submucosal fibroids, endometrial polyps, intrauterine device and embryonic tissue residue after abortion. Hysteroscopic treatment not only allows patients who had to have their uterus removed by traditional methods to avoid open surgery, but also preserves the uterus, and is safe for patients with bleeding disorders such as thrombocytopenia, hemophilia and leukemia. In addition, hysteroscopy can be used to examine the vagina and uterine cavity of young girls and unmarried women to detect abnormalities there in a timely and accurate manner and treat them accordingly, while also protecting the integrity of the hymen and reducing the patient’s pain. Hysteroscopy can also be used for the diagnosis of causes of infertility, correction of uterine malformations and, when necessary, for the diagnosis of early endometrial cancer. Indications for hysteroscopic treatment: 1. Frequent uterine bleeding, including excessive menstruation, frequent menstruation, prolonged menstruation, irregular uterine bleeding, etc. 2.Infertility and recurrent spontaneous abortion: on the basis of comprehensive and systematic evaluation of both men and women, the intrauterine etiology is explored and corrected. 3.If there is abnormality or suspicion suggested by ultrasound, iodine oil imaging of the uterine tubes or diagnostic scraping examination, the diagnosis can be confirmed, verified or excluded by hysteroscopy. 4, Those with intrauterine adhesions or intrauterine foreign body residues, the latter including fetal bone fragments, etc. 5.For those suspected of endometrial cancer and its precancerous lesions, the application of hysteroscopy and localized biopsy combined with histopathological assessment can help early diagnosis and timely management. 6.With proper patient selection and complete preoperative preparation, certain hysteroscopic procedures can replace or change the traditional treatment methods. 7.The application of hysteroscopic treatment technology in family planning clinical and scientific research.