Background: Geography knowledge involved mutal relation between human and environment conditional to keeping environment healthy. Human characteristics has its principle, environment is also the same but its difference is that environment principles are predestination and are functions of creation principle, and in human, principles are more instinctive and bodily, there are some basis which depends on thoughts, so this principle make human different with other animals, and is deeply consisted on moral principles and involved pure thoughts.
Methods: Research is a library method and using database and professional magazines.
In this paper we study keeping environment healthy which is one of the principles in geography so that we can study its function and moral behavior with different aspects and by focusing on medical geography as a lost ring in logical relation which must exist between human moral principles with environment, we study this point that medical geography is a knowledge which really has moral characters.