Abstract
Chuy$\check{o}$k and Naeky$\check{o}$ng which are the foundations for oriental philosophy and oriental medicine respectively have had a great influence on Oriental ideas for several thou s and years. On this study is focused on the comparative study about the two. And the results are as follows; 1. Chuy$\check{o}$k and Naeky$\check{o}$ng agree with respect to the relationship between Nature and Man, They both insist that everything should come into being through collaboration between Heaven and Earth and that Man is the noblest among them. 2. Though Chuy$\check{o}$k and Naeky$\check{o}$ng agree in regard to the authority of Man's nobility, the one stands on the opinion that Man is noble because of 'Tao'(道), while the other maintains that Man is precious because he is created and changed according to the principle of the Universe. 3. There is a slight difference between Chuy$\check{o}$k and Naeky$\check{o}$ng in the principle of Yin and Yang, and the live elements of the Chinese cosmogony. Chuy$\check{o}$k explains the change and development of everything on the basis of the principle of Yin and Yang, and make no concrete mention of the five elements of the Chinese cosmogony. While Naeky$\check{o}$ng applys the principle of Yin and Yang and the five elements of the Chinese cosmogony to the human body. 4. Though Chuy$\check{o}$k contains little knowledge of the inside of the human body in the anatomical matters, it includes some informations of the outside of the human body. But the basic physiological informations had already existed at the time. 5. Regarding the way of life cultivation. Chuy$\check{o}$k and Naeky$\check{o}$ng concurs. The two books advise to avoid unsuitable meal, overdrinking, inappropriate residence and so forth for the sake of good health. They make much of the mental harmony and maintain the accommodation to the change of Nature to keep a sound mind and body.