Uterine endoscopy, generally referred to as hysteroscopy, is important for women to undergo a series of examinations and treatments such as examination, diagnosis and analysis. Hysteroscopy is a minimally invasive gynecological diagnostic and treatment technology, which mainly uses the front part of the mirror body to enter the uterine cavity and magnify the observation area to make the examination more intuitive and accurate. Generally, if the results of ultrasound, diagnostic scraping examination, uterine tubal iodine oil imaging, etc. show abnormalities, the examination can be carried out to confirm, verify or exclude. Hysteroscopy, localized biopsy combined with histopathological evaluation can also be used for early diagnosis of endometrial cancer and its precancerous lesions, so that reasonable measures can be taken in time. Clinical candidates for this test include infertility and recurrent spontaneous abortions, frequent menstruation, irregular uterine bleeding, prolonged menstrual periods, heavy menstrual flow, and those who are suspected to have endometrial cancer and its precancerous lesions. Patients are advised to have hysteroscopic examination reasonably after strict evaluation by the doctor and actively cooperate with the doctor to do the relevant matters so as not to affect the examination results.