This article traces the development origin of traditional Chinese medicine etiology and pathogenesis from the etiology theory and pathogenesis theory.Then it summarizes the research methods in the past traditional Chinese medicine etiology and pathogenesis theory.That mainly includes three aspects: based on the inheritance and pay attention to synthesize new knowledge,based on the tradition and using modern science and technology,based on the theory and combined with clinical practice.This paper argues that the existing etiology and pathogenes...