Polycystic ovary syndrome (PCOS) and dysfunctional uterine bleeding (DUB) are common gynecologic endocrine diseases, and their etiology, pathology, diagnosis and treatment are related but also distinguishing. Some patients have PCOS and DUB at the same time, which is difficult to cure. Professor ZHANG Liang-ying has treated these patients with staging treatment based on syndrome differenciation, and has received desiable efficacy.