The purpose of this research is to examine progresses of formation of the concept of ‘Subject Korean’ which the nation has imagined and organized through a course of ‘Subject Korean’ that was started together upon claiming to support modern people’s nation. Just like all other modern systems, the concept of ‘Subject Korean’ as a school course was not something which was decided a priori despite it looks so clear. When ‘Subject Korean’ was created as a system school course, what was expectation of ‘Subject Korean’ as a school course? In what character has ‘Subject Korean’ built the concept of a school course? are main issues of this research. For handling this issue, in this research, selection and deployment of knowledge realized in textbooks with the object of school textbooks compiled in early period were reviewed. As everyone knows, formation and change processes of specific concept is closely related to selection of knowledge and deployment of discussion. As a result, it can be said that ‘Subject Korean’ as a modern school course has built the concept as a school course by selecting and deploying Joseon and Joseon people, in general, the nation and the people as knowledge of the course.