In the past 20 years,the diagnostic technology of traditional Chinese medicine( TCM) has made breakthrough progress. It has achieved fruitful results in the objective information collection equipments and data processing softwares for tongue diagnosis,face diagnosis,voice diagnosis,olfactory diagnosis,inquiry and pulse diagnosis,and has carried out the corresponding clinical research.However,in the standardization of diagnostic techniques and indicators,it is still in its infancy. At present,only one international standard for tongue diagnosis apparatus and one international standard for pulse diagnosis pressure sensor are published. With the deep penetration of computer information processing technology in TCM field,the pattern recognition method has been applied and developed in the four-diagnosis information fusion,and the auxiliary diagnosis and treatment system based on comprehensive analysis of data gained by four diagnostic methods and the TCM four-diagnosis detection system have been developed. These research results contribute to the establishment of syndrome differentiation model and artificial intelligence recognition platform which is more suitable for TCM thinking.In the future,with the help of internet of things technology,cloud platform technology and wearable technology,the four-diagnostic information collection equipments should be developed to be miniaturized and wearable,and the TCM robot for diagnosis and treatment can be developed. It is expected to play a greater role in TCM clinic in all levels of medical platforms,chronic disease management and health risk assessment.