The word "Qi-Gong" firstly originated from Taoism in the Jin era means to concentrate true energy and to cultivate new energy and thus to make our vitality strong. Qi-Gong, which means breathing method and physical exercise had been developed in various directions from ancient China. "Zhubingyuanhoulun" intensively summarized these various methods for Qi-Gong, and the theory of Qi-Gong as practical treatment. Through this study, this author attempted to newly define the essences of Breathing training method and to review the conception, the history in "Zhubingyuanhoulun".