[Objective]Investigating Professor WANG Peijuan's clinical experience in treating PCOS from studying the kidney. [Method] This paper mainly studied by arranging and researching the tutor's theory and experience about treating PCOS that based on the practice in clinic with the teacher as a self perception,the collection about the PCOS cases of tutor's clinical treatment and the analysis of national and international relative literature combined with self-awareness. [Result]Professor WANG thinks that PCOS is the disorder of qi and blood and the transformation failure of kidney-Tiangui-Chongren-uterus, which leads to phlegm and blood stasis, blocking in the uterus and making menstruation lose its inhere periodicity. The disease is of the kidney deficiency and phlegm stagnation syndrome.[Conclusion]Professor WANG holds that to use the method of tonifying kidney properly and attach importance to the three categories of etiologic factors will be effective to the treatment of PCOS. Her experience can provide the basis for diagnosis and treatment about the disease.