Abstract:The ecological civilization is a newest stage in the history of human civilization. It inherits and critiques various kinds of civilization in human evolution, such as the inherence of “simple-hearted and honest” of the primitive civilization, the “diligent and conscientious” of the agriculture civilization, and the “keep forging ahead” of the industrial civilization, it also discards “blindness” of the primitive civilization, “dependent” of the agricultural civilization, and the “plunderness” of the industrial civilization as well. The ecological civilization refers to the set of words “rational reasoning, green, balance, harmony, and sustainable development”. In the spectrum of human civilization, the primitive civilization, the agriculture civilization, and the industrial civilization have had great contribution to social progress. In the paper, the author provides the theoretical expression of ecological civilization and its mathematical model. The paper includes six parts: introduction, calls for ecological civilization, from the primitive civilization to the ecological civilization, the philosophical connotation of ecological civilization, Ecological civilization of the propelling force of history, and The mathematical model of ecological civilization level.The author would believe that the ecological civilization is an ideal state as well as a realistic objective, and, a harmonious society must advocates ecological civilization and emphasizes sustainable development.