Three planks of the Triangular position theory was first introduced by Sanghallon(傷寒論) authored by Jang Gi. It is the regulation for the matter of diagnosis of three different clinical symptoms in the causes of exogenous disease. It brought two questions to the scientists. First question is what are the Wind stroke(中風), Affection by cold(傷寒) and the complex form of Wind stroke(中風) and Affection by cold(傷寒) mentioned in Sanghallon. It is related to the theoretical analysis of the causes for the outbreaks of exogenous disease. Second question is what are the characteristics of symptoms to use Gyejitang, Mahwangtang, Daecheongnyongtang according to Sanghallon? It is the matter of clinical skills for dispensing a prescription. Through the theoretically and empirically deepening processes for last two millenniums, those two questions brought us two more problems further. That is, how and by what processes the Six vital substances for humal life outbreaks disease as a energy transformation? And, how the individual peculiarities of human body as a disease container should be treated? In conclusion, it is also a matter of the existence of dialectic medical science.