In the judicial system of Taiwan today, the judges and prosecutors Trained during the postwar period have taken the place of those ones trained in Mainland China and Colonial Taiwan. This article is a study of the composition of the former ones by researching the training process in the Judicial Training Institute of Department of Justice (法務部司法官訓練所) since 1955, including the training program, the discipline, the age ,gender, and career planning of the trained members. This article also wants to explore whether such a training process leads to some kind of special judicial culture in Taiwan today, as emphasizing the importance of discipline, of the consistency of form of judicial decision, and of the priority of graduation from the Institute. On this basis, it would like to understand the potential impact of such composition and culture to the legal profession in Postwar Taiwan.