ABSTRACT
After the methods for selection of syndrome concepts and establishment of relationship between syn-drome concepts in Traditional Chinese Medicine Clinical Terminological System version2.0 were described, the principles and specific methods for the selection of syndrome concepts and establishment of relationship between syn-drome concepts in Traditional Chinese Medicine Clinical Terminological system version2.0 were studied according to its general revision principles in the light of relevant standards in traditional Chinese medicine, various editions of teaching materials and medical records, the advantages of descriptive definition and logical definition of syndrome concepts,and the establishment of relationship between syndrome concepts derived from syndrome concepts were elaborated.