This study investigated the preferences of Korean teachers regarding design of a desirable teacher re-education course, through which the following improvement directions were confirmed and suggested. The first is the improvement direction of the operating system. Currently, the focus is on improving the teacher’s ability for each task; however, it was found that teachers expect to concurrently increase their general ability as Korean language teachers. Moreover, the study revealed that the differences in preference by career should be reflected in task-specific education. More precisely, this implies that the training curriculum for each career should be structured so that he preferred training content differs by experience even within the same task. The second refers to the curriculum organization. Although the current focus is on teaching methods rather than on Korean knowledge, we determined that teachers expect to develop skills in both fields. In this context, demands were placed on the methods of teaching and field class operations concurrently. Currently, the focus is on managing classes, but teachers prefer to study teaching theory simultaneously. The above demands indicate an expectation of change after continuing to apply the same operating method for approximately 10 years rather than reflecting dissatisfaction with the current re-education curriculum. Since many teachers have had training experience, the change should be based on the desire to expand their competency as Korean language teachers rather than on specific tasks.