Culture is the main topic to discuss in the 21 century, since its humanistic and economic values are worthy of profitability in cultural industry. Most nations attempt to improve their own ‘Nation Image’ by nation branding in many ways. South Korea also tries its best to raise the value of nation, nation- image, nation-brand by advertising our traditional culture and mass culture all over the world. Especially, South Korea globalizes the excellency of Hangeul, which proves to be one of the most scientific alphabet systems and learner-friendly easy letter systems in the world. This paper examines Korea’s foreign cultural policy toward the support to Hangeul education and advertising of Korean culture in King Sejong Institute, which plays an important role in spread Korean culture and Hangeul to the world. King Sejong Institute is renamed after the creator of Hangeul, King Sejong as a Korean nation-branding for effective control and foreign policy. Hallyu is a leading culture to introduce ‘South Korea’ to foreigners, but it is not under control of Korean government as a policy. King Sejoing Institute offers many courses of Korean and Korean culture as a foundation for cultural exchange and nation-branding.