Through collecting and organizing the medical records of Professor Liu Jiaxiang treating lung cancer and by using data mining technology such as BK algorithom and entropy based complex systems, we study the related principle-method-recipe-medicinal features through such aspects as the basic formula for each TCM syndrome, the relationship between medicine and syndrome, the law of prescription composing. The aim of this study is to summarize and perfect Professor Liu’s experience of treating lung cancer to provide reference for the inheritance of experience of famous doctors and the development of thoughts of treating lung cancer by TCM, and at the same time we expect to open up new ideas for study the feature of drug using of prescriptions of famous doctors by using entropy based complex systems method.