The purpose of this study is to propose an institutional and strategic framework for preserving and managing Maegok Fortress in Boeun County, Korea, by redefining it as community critical infrastructure. Historical and cultural heritage resources are essential to sustaining community identity and enhancing community resilience, yet non-designated sites such as Maegok Fortress remain highly vulnerable to natural deterioration, development pressures, and institutional neglect. To overcome these challenges, this research introduces the Phased Strategy for the Preservation of Maegok Fortress, comprising four stages: ① foundational protection, ② historical value identification, ③ identity restoration, and ④ conservation & utilization. This phased approach integrates disaster management perspectives with cultural heritage preservation, aiming not only to safeguard physical integrity but also to restore historical significance, reinforce community identity, and promote sustainable local development. By benchmarking international models and emphasizing legal reform, institutional safeguards, and central–local government cooperation, this study highlights the necessity of embedding cultural heritage protection within the broader framework of critical infrastructure management.