Abstract
This research is purposed to find Dong-mu's thought on 'philosophy and medical interrelationship' in his writings. It was researched with Dong-mu's chief medical writings such as ${\ulcorner}$Gyukchigo(格致藁)${\lrcorner}$ , ${\ulcorner}$Dongyi Soose Bowon(東醫壽世保元) ${\lrcorner}$ , ${\ulcorner}$Dongyi Soose Bowon Sasang Chobongyun(東醫壽世保元四象草本卷)${\lrcorner}$ , ${\ulcorner}$Dong-mu's posthumos work(東武遺稿)${\lrcorner}$ Dong-mu describe his philosophy conception with the system of The Book of change(周易). But he changes the meaning of Taegeuk(太極), LangYui(兩儀), Sasang(四象) on the respect of human being. Gyuchigo(格致藁) can be understood as social behavior pattern of Sasang constitute. From ${\ulcorner}$Gyukchigo(格致藁)${\lrcorner}$ to The theory of Sung-Meung(性命論), It is focused on Nature(性) and Order(命). Affairs- Mind - Body-Objects(事心身物) was distributed at Heaven-Human -Nature-Order(天人性命) on the respect of Human Moral. In the respect of Form-Use(體用), It is assigned to Form(體) and metaphysical philosophy. After The theory of Sa-Dan(四端論) in ${\ulcorner}$Dongyi Soose Bowon(東醫壽世保元) ${\lrcorner}$, It is focused on Nature-Emotion(性情). Affairs - Mind - Body - Objects(事心身物)is distributed at Heaven-Human -Nature-Order (天人性命) on the respect of human internal mind. In the respect of Form-Use(體用), It is assigned to Use(用) and Physical science. Sasang Constitution can be expanded to Eight COnstitution in the respect of dominant position among Nature(性) and Emotion(情).