"Eumyang-ihamnon(陰陽離合論)", from aspects of the Samjae theory[三才論], presents the unique insight for understanding dynamics of three Eum and three Yang[三陰三陽] throughout human body in fundamental level, defining purpose and essence of three Eum and three Yang motion. Furthermore, it indicates Bunbu(分部) of three Eum and three Yang, utilizing principles of Yukhap(六合), which serves as logical basis of three Eum and three Yang Byeonjeung(辨證). With theoretical meaning and practical values of "Eumyang-ihamnon(陰陽離合論)", this study investigates significance of three Eum and three Yang-Ihap-Motion in terms of the Samjae theory[三才論] and clinical uses of the three Eum and three Yang Bunbu theory[三陰三陽分部論].