Hetuvidya is one of the three original systems of logic in the world. It contains three different types: Hteuvidya in India, Hetuvidya in Tibet, and Hetuvidya in Center Plains. The author in this paper gives an outline of development of the three types, describes each distinct featrues and especially elaborates their developments in logic and philosophy. The coming of new Indian Hetuvidya realized its logical leap from inductive reasoning to deductive reasoning. In Center Plains Hetuvidya developed a system dialectical logic which included "Eight Branches and Two Oestinations", and explored many problems about pragmatic logic and dialectial logic. In Tibet Hetuvidya gained more development in ontology, knowledge and logic. Hetuvidya is not only a crystal of Buddhist wisdom, but also a treasure of fraditional Chinese culture.
