Yun gi doctrine is on five elements motion and six kinds of natural factors. Nature moves in a cycle. This phenomen on occurs periodically. Therefore everthing rotates including climate and temper. This circulation maintains the balance of nature. Yin and Yang is the two fundamental principles or forces in the universe, ever opposing and complementing each other-an ancient philosophical concept used in traditional Oriental medicine to refer to various antitheses in anatomy, physiology, pathology, diagnosis and tertment, e,g., feminine, interior, cold and hypofunction being Yin while masculine, exterior, heat and hyperfunction are Yang. Wuxing is the five evolutive phases of the five elements. That yin-yang, wuxing express the balance of nature well. This volume contents five chapters. ChapterⅠ deals with the five circuit phases and six atmospheric influences not match yin-yang. ChapterⅡ deals that Wuyun gets possession through the sky. ChapterⅢ deals with the movement's change of sitian, zaitian. ChapterⅣ deals with Liupi's movement and its effect upon human body. ChapterⅤ deals with the rule of yungi's influence.