The natural philosophy which is implied in Zhouyi is a philosophy of generation. This is a metaphor for life and the unity of cosmology, ontology and axiology, based on a practice of life which is a unity of moral and cognitive practice. This article suggests that, based on the implications of the original classic text of Zhouyi and its commentaries, the characteristics and meaning of Chinese natural philosophy can be understood through the cosmology of morality, the ontology of unity of heaven, earth and humanity, the theory of practice that integrates knowing with action, and the methodology of wholly generating. I argue that this unique natural philosophy is not only the origin of the transcendental values of Chinese culture, but also the metaphysical foundation of ancient science in China. In the great transformation of history and dialogue between East and West in 21st century, it creates a unity of different cultures of human beings from different ways which are harmonious but not uniform.