This research aims to reveal the educational value of Korean classic argumentation in light of classic education. The classic argumentation in Joseon dynasty had been a communicative genre which had important function practically and educationally. But afterward from the modern times, the classic argumentation genre was dead in both practical and educational meaning. This phenomenon is worth inquiring from the viewpoint of canon shift. In the modern times of Korean history, the medieval canon had been shifted to modern canon very abruptly. In the process, the educational value of Korean classic argumentation has been denied without serious deliberation. This research inquires the process of the classic argumentation genre’s losing its status of canon and proves the incompleteness of modern canon shift. This research also discusses the meaning and potentialities of the classic argumentation. It has the value of cultural text in which students can read cultures as part of the cultural education.