Endometrial cancer accounts for 20-30% of malignant tumors in female reproductive system, and the incidence is increasing year by year. Those who encounter one of the following conditions should have endometrial examination immediately 1.Postmenopausal bleeding or bloody leucorrhea, after excluding cervical cancer and vaginitis, endometrial cancer should be highly alerted and endoscopic surgery should be performed. 2.Irregular vaginal bleeding over 40 years old, which cannot be stopped despite hormonal treatment, or recurrence after once stopping bleeding. 3.Those who are younger but have long-term uterine bleeding and are infertile. 4.Persons with persistent vaginal fluid discharge. 5.Patients with atypical endometrial hyperplasia and bleeding. Or those who have repeatedly found malignant cells in vaginal smear. Endometrial cancer develops slowly and the metastasis is mainly direct invasion, so the treatment effect is better, and surgery is quite effective, and some have to add radiation therapy. For non-early stage (carcinoma in situ or severe atypical hyperplasia) and advanced stage patients, hormones can also be applied. However, it should be noted that endometrial cancer is related to long-term stimulation of estrogen, so estrogen should be applied carefully.