Biopsy under hysteroscopy is more precise than curettage in the patients with early-stage endometrial cancer.In the meantime the lesion of cervical canal can be observed clearly，and doctors can make the initial staging，and through combining imaging procedures，doctors can make preliminary judgment of the range of tumor spread. Hysteroscopic operation with high dose of progesterone therapy，GnRH-a and Mirena can be used in the patients who try to reserve procreative function after strict screening.