Abstract:Ectract: It is explained and acquired the DA QUAN by scholar Feng around three dimensions of Ontology, Ethics and Epistemology. From the angle of Ontology, the philosophical system of Mr. Feng’s Neo-Confusion logically conflicts with his DA QUAN, however, which complement the Neo-Confusion with the character of one world. From the angle of Ethics, DA QUAN develops the Confusion ethic philosophy of Neo-Confusion on the base of Ontology. From another angle of Epistemology, DA QUAN is not the object of Epistemology, it enhances the transformation of Feng Youlan’s philosophical method from logics to mystery.