On the basis of the modern literature and clinical cases investigation of CF, and under the guidance of the theory of traditional Chinese medicine, we screen the diagnosis factors and kinds of syndromes and symptoms by using the computer technology, database technology and intelligence information processing technology (as: vague-mathematics, Bayes'method and artificial neural network, and so on) and establish the respective database, and develop the cardiac failure expert system. This study refered to a Cardiac failure Chinese medicine expert system under the guidance of the theory of traditional Chinese medicine, which combined the computer technology, intelligent information processing technology and Chinese medicine theory, it achieves intelli-gentification of Chinese medicine symptoms' diagnosis of Cardiac failure. The core-modular of this system is the modular of symptoms' diagnosis, it can do distinguish diagnosis of the Chinese medicine symptoms by coding and definiting the diagnosis factors and using the computer programme. This system is profit to elevate the clinical diagnosis' normalization of medical worker, and the clinician's accuratissime and speed of differentiation of symptoms and signs.