Medical purpose is a concept of viewing the situation as a whole, development and perpetuity. It is important that how to realize the medical purpose but not define itself.There are similar main conten of medical purpose extending directly from various stages and existing between eastern and western countries, and this is determined by characteristics of mde-icine. However, the fommer concept of medical purpose will show relative partial deficiency, and its intension will enlarge in the new stage of social, ecconomic and medical development. It also brings us new methods, ideas of thought, and make them fit for the requirement of society to medicine and the non-fungible function of medicine to human health. So the central content of medical purpose is running after the health of person and human based on elevating life quality, maintain and enhance social productive forces. This is extreme purpose of medicine and common adimission of world medicine.The realization of medical purpose is guided and restricted by the concept of humanistic ethics. So, understanding and discussion of medical bepose must be carried out guided by it and its theory frame. The centre of mordern medical humanism is the respection to the human valuation related to medicine, including that of person, group and society. Primarily, the valuation is emphasized on the human life quality and health valuvation, which are directly and first reflected not only in mordern medical humanism, but also in medical purpose.In this sense, the intension of medical humanism is equivalent to the central content of medical prupose defined above all, and the medical humanism is medical purpose. The focus reflection of medical purpose is the thought of medical humanism, one is objective of medical developmant another is the thought and principle defined for achieving the objective.