The purpose of this study was to suggest principles and scope of history contents as a C2 in teaching Korean as a heritage language (HL) for overseas Koreans, and to present examples of using relationship history for practicing intercultural viewpoint. This study started with the premise that dealing with history in teaching Korean as an HL has a positive effect on improving intercultural competence of overseas Koreans. Intercultural education is possible through the process of comparison and interpretation that examines similarities and differences between C1 and C2 in context. By comparing and interpreting the relationship history between two countries, intercultural education of language and history can be implemented, which allows learners to acquire not only language skills but also universal values. It would be meaningful that this study provided some clues for intercultural history education for overseas Koreans especially using the relationship history of two specific countries. The study focused more on teaching contents than language, however, intercultural competence is an expanded concept rather than the language knowledge or language performance ability itself.