This study aims to apply the newly developed 'Regional Space-MBTI' diagnostic system to 89 population decline areas, analyze the characteristics based on the diagnostic results, and provide policy implications. To conduct the study, 72 survey items were

redesigned and surveys were conducted on 6,874 individuals from 89 regions, including residents and public officials. The collaboration between the Institute of Spatial Architecture and the Ministry of Public Administration and Security was crucial for the

study, as it carries significance in conducting regional characteristic diagnoses for 89 population decline areas as part of the response to regional decline.