Abstract：The theory of ascending and descending movement of qi mechanism is an important theory in Chinese medicine. The ascending and descending includes both the ascending and descending of the essence of the human body and that of the visceral and bowels. As the goal to be achieved by the ascending and descending movement of qi mechanism，"clear yang ascending to upper orifices" should include all the healthy qi that is sufficient enough to ascend to the upper orifices， including yang and qi which are “yang” in function and yin and blood which are “yin” in physique and nature. The disorder ascending and descending movement of qi is either caused by deficiency or excess， that is， blockage and ying qi deficiency. Therefore， the treatment principle of "unblocking to promote the qi movement and supplementing to achieve ascending and descending" should be followed so that clear yang can ascend to upper orifices.