Abstract
"Regulatory Function of Lung(肺主治節)" is one of the major function of lung, but its meaning is still controversial. The word "治節(Regulatory Function)" was first discovered in "黃帝內經(Huangdineijing)". In Chinese medicine text of modern China, physiological meaning of "治節" can be roughly divided into two; one is respiratory function, and another is to help cardiovascular function of the heart. In addition to this, "治節" has been construed in various ways, but all of them is not realistic. There has been several viewpoints that '節' in '治節' means 24 seasonal divisions and they can be representatively found in "東醫寶鑑(Donguibogam)". Based on all of these views, modern western medical physiology is requirement for further study about physiology of internal organs.