Based on the theory system of "Three-basis Syndrome Differentiation"（三基辨证）

this paper discusses the connotation and nature of "syndromes" in detail

preliminarily clarifies the limitations and application scope of "syndromes" and conducts an exploratory study of "syndromes" standardization. It is pointed out that "syndrome" has the three characteristics of three-basic integrity

three-basic independence

and three-basic explicitness

and the limitation of "syndrome" is that it has no classification and no support. The general method of "syndrome" standardization is to make theoretical analysis based on the description data of the "syndrome" such as syndromes

prescriptions

and pathogenesis

and introduce clinical and experimental research when necessary

and finally determine the syndrome-base space

syndrome-base material and syndrome-base movement to make it meet the nature of the "syndrome"

thus completing the standardization of the "syndrome". The problems that need to be solved in the standardization of "syndrome" include the confusion of the connotation of the syndrome name

too complicated and wide connotation of the syndrome name

and the too complicated and wide name not corresponding before and after the conversion. It is proposed the realization path of traditional Chinese medicine diagnosis and treatment intelligence based on syndrome database and natural language processing technology lays a theoretical foundation for the related research of "syndrome" standardization

and also provides innovative ideas and methods for traditional Chinese medicine syndrome diagnosis intelligence reference.