This paper explains the influence of ,Mozi,'s concept classification on disease classification in ,Huangdi,Neijing, from four aspects： the basic idea of concept classification in ,Mozi,， the hierarchical understanding of disease classification in, Huangdi Neijing,， the logic of various “diseases classification” in, Huangdi Neijing, and the “similarities and differences” of “diseases classification” and clinical significance. The concept classification noun logic established by, Mozi, is reflected in cognition of “diseases classification” in ,Huangdi Neijing,. The concept of “disease classification” is summarized and extracted by ,Huangdi Neijing, from the similarities of etiology， pathogenesis， disease location and symptom manifestations of various clinical diseases. This concept plays an important role in grasping the rules， attributes and characteristics of such diseases. It is also the theoretical basis of different treatments for same disease and same treatment for different diseases.