The aims of this study were threefold: based on a comprehensive literature review and a series of advanced researches (1) to discuss the national brand identity of Korea (2) to concrete the core concepts and constituents (3) to conduct an empirical research to notify the causal relationship with functional equity of the nation brand. In the concrete, the first step of this study is to establish four dimensions of the national brand identity including social system, leadership/growing power, nation people, national heritage through the empirical comparative analysis among Korea, and their neighbor countries, Japan and China. Based on established dimensions of national brand identity, it is founded that both Korean and foreigners have differential awareness of Korea and their neighbor countries in competitive condition. Finally, the research validates the existence of relative differences through the verification on the influence of each 4 dimension of national brand identity on 6 functional nation brand equity. In that sense, the results of this study suggest that the importance of national brand identity-centric nation brand management strategy and differentiative nation brand building activities for each foreigners and native residents should be concerned. in addition, other significant interpretation and discussions are provided, following the evaluations. Keywords : National Brand Identity, Nation Brand, National Heritage, Social System