Sasang constitutional medicine was born on basis of constitutional cognition in Korean History. Only if we look at Sasang constitutional medicine on the environment of korean unique culture, geography and historical tradition, the true feature come into view, and on the contrary we could grasp to which degree it has general properties. Sasang constitutional medicine pursue inner principles of human being, that has been the most important traditions of Korean medicine. Also that properties are results of continuous confirming academic universality and constant efforts to look for the medicine that is most fit to clinical practice. For the purpose of developing world medicine, we must grow that specific characteristics of Sasang constitutional medicine.