Objective To provide scientific evidence for the establishment of medical specialist system in China by investigating the history, current situation, problems and countermeasures of medical specialties training at home and aboard. Method The principle and theroy of evidence-based medicine were adopted. The information before Dec. 31, 2003 of Pubmed, CBM, official website, some journals, most frequently used search engines and medical monograph were systematically reviewed. Included literatures were assessed and graded according to the pre-defined criterias. Results A total of 1 319 studies (1 298 in English, 21 in Chinese) were included, among which only 6 were related to the classification of medical specialties. Based on the information from official website of USA, Canada, UK, Singapore, Australia and China (including HK and Taiwan), it showed that China has the largest number of medical specialties, followed by that of USA. In China, the number of medical specialties has more than that of the disciplines in clinical field, which was followed by resident training programs. Some specialties were duplicate, or not international standardized. Conclusions The classification of medical specialties should be developed consecutively, which comprehensively considered the international trend, characteristics of doctor training and the current situation. Specialties whose training program are well-established and developed should initiate firstly. Others will be put into practice gradually after being fully exprienced.