Clinical data is a dispensable source to conduct clinical research. Commonly-used terms of clinical Chinese medicine are carrier of clinical data. Its completeness and normalization are the important precondition of acquiring high-quality clinical data. This paper analyzed the fundamental quality demand of commonly-used clinical Chinese medicine terms

and the common problems in aspects of completeness

normalization and conceptual relation.The authors raised to establish ontology of commonly-used terms of clinical Chinese medicine using technique of ontology. Additionally

they concluded the key technology steps of constructing ontology of commonly-used clinical Chinese medicine terms

including establishing application technology system of clinical commonly-used terms

constructing standard of clinical Chinese medicine terms

acquiring commonly-used terms of clinical Chinese medicine

establishing ontology relationship of frequently-used terms of clinical Chinese medicine

and conducting testing and visualization of ontology. Conducting concept identification and description of commonly-used clinical Chinese medicine terms from the aspect of ontology

and establishing correlation between concepts

can eliminate the uncertainty of Chinese medical concepts and uncertainty of their correlation.