Essentially, there are great differences between the reasoning mode of Chinese Derived Hetuvidya and Tibetan Logics. While the Chinese Derived Hetuvidya mainly inherits the three branches of Dignaga's Hetuvidya reasoning, Tibetan Logics is the redevelopment on the basis of the Dhamakirti’s Hetuvidya reasoning. From the viewpoint of logic, this article compares the reasoning mode of the Chinese Derived Hetuvidya and the Tibetan Logics and tries to discuss the possibility of their logical description.