《內經》運氣七篇所記者乃五行與六氣之基本要義，內容包括天地之陰陽、五行之太過與不及、六氣之加臨、五運之亢害承制、天干紀運地支紀氣、四時二十四節氣等變化，宋代醫家重新編纂發揮。五運六氣絕非只是推斷天氣、測算命運的學問，實際是傷寒論、溫病學之基礎，本文以天人相應之觀念重點介紹古人以氣運治病之原理。今時值癸巳歲厥陰風木司天，五月逐漸進入暑熱流行時令，人居天地之中，夏暑炎熱之天氣變化，自天、地及人，人為要適應暑熱，便會出現口渴、飲水增多、汗出、小便少等臨床症狀。中醫對暑症之分類甚為詳盡，自漢．仲景言暑熱中暍至清．類證治裁千餘年，古籍文獻大量記載了暑證之辨治、病名、病機、理法方藥等都很明確。靈素之運氣陰陽指導著傳統中醫的形成，臨證是經驗與理論之結合，暑熱症之內容廣泛，重則成暑瘵、暑瘟，輕者冒暑、傷暑、涼暑等，若能應用五運六氣於暑證之辨治中，天人相應之奧理亦喻在其中矣。

The seven doctrines of Yun-Qi from Neijing ,had been taken as the basic teaching of the Five-Elements and Six-Qi since the Sung Dynasty (A.D. 1000). The contents include Yin-Yang of the Universe, overload and underload among the five-elements, summation of the Six- Qi causing transformation, the ten sky-symbols(Tian-Gan) and twelve earth-symbols(Di-Ji) symbolized Qi and Yun and also the four-seasons in accompany with the 24 seasonal circle, etc. Actually, objective of Yun-Qi is not for forecasting climates nor telling fortune, most ancient scholars considered it to be the fundamental basis of Shan-Han-Lun and Wen- Bing in the aspect of Yin-Yang. Nevertheless, the concept of Universal- Human-Unison had been applied to therapeutic medicine for over a thousand years as shown in this study. Year 2013 named the Gui-Si(癸巳) year from the Chinese calendar which may cause heat-wind-dampness in the summer time based on the Universal-Human-Unison theory further explained the climate changes. During summer , as we know that all creatures on earth become hotter which may give out sweating, thirsty, drinking water, oligouria as in conserving water and lowering down body temperature for survival. The classification of heat-diseases was well documented in TCM since the (Han Dynasty, A.D. 200). Lei-Zheng- Zhi-Cai (Ching Dynasty, A.D. 1850) further collected the differential diagnosis of the heat-diseases with pathophysiology and etiology involved. Yun-Qi Yin Yang was documented in Neijing which guides traditional TCM to clinical and theoretical integrated as a whole. Minor and critical condition in heat-disease ,which illustrated in this study, can be found in TCM literature while in critical condition such as heatconvulsion, break out of the heat-flu and the minor such as commonheat, cold-heat etc. Chinese culture found that heat-disease is a popular disease in summer time which is partly disclosed by western medicine and is fully explained in the book of Neijing with the title of the seven doctrines of Yun-Qi as well as in TCM for almost two thousand years.