Opinions about Simpo[心包:Xinbao], Samcho[三焦:Sanjiao] and Myoungmoon[命門:Mingmen] are controversial from begin of Oriental medicine [醫東學]. In this study I first will focus on each opinion about 3 things above that many doctors had mentioned before and find out the meanings that those doctors had tired to explain. Secondly I will try to consider the meanings of Shimpo Samcho and Myoungmoon themselves. Thirdly I will explain that the relations between Shimpo, Samcho and Myoungmoon by theories of Organs[臟腑]and Meridians[經絡] Korean Oriental Medicine and the substantial meanings through those works that I mentioned above. Finally I could have conclusions about Shimpo, Samcho and Myoungmoon. Shimpo is a intermediation between Shim[心:Xin] and Shin[腎:Shen] at the point of Shimshinsanggyo[心腎相交:Xinshenxiangjiao] and Myoungmoon is a intermediation also as same as Shimp although shimpo is based on Shim and Myoungmoon is based on Shin. sanghwa[相火:Xianghuo] is related to Shimpo and Myoungmoon at the view of the naming structure of Meridians. Each Shimpo and Myoungmoon has the meaning of Sanghwa. Samcho is suppose to be tube structure and have a pair with Sanghwa because of position in the naming structure of Meridians so it contains Sanghwa as a pathway of Sanghwa.