Korea's 2001 registered cultural heritage system evolved in 2018 into a spatial management framework for "Modern Historical and Cultural Spaces," with nine sites registered by 2025. While maintenance plans are in progress, implementation has faced recurring limitations: inadequate landscape protection for non-dot units, poor integration with broader urban planning, and legal blind spots for peripheral resources. This study addresses these discrepancies through an empirical analysis of the maintenance process in the "Modern Historical and Cultural Space in Seocheon Pangyo" By comparing this case with Dihua Street in Taiwan and Kawagoe in Japan, the research proposes systemic reforms and practical implementation strategies tailored to the unique spatial characteristics of the Pangyo district.