This study explores the role of THAAD - which has been at the center of the debate among Korea, the U.S. and China - in alleviating north Korean nuclear issue. Limiting its scope to the period of Kim Jong-un regime, when nuclear race has been taken in higher pace than past, this research employs network-based approach as a method of analysis. By employing the method, which emphasizes the role of non-human actors, this research is expected to contribute to the diversification of north Korea-related studies by suggesting a different perspective