The purpose of this study is to derive implications for effective policy implementation by analyzing the characteristics of urban decline. For this purpose, correlation and frequency analysis between urban characteristic variables and the degree of decline were conducted, and the main results are as follows. First, population size, urbanization rate had no correlation with the degree of decline, and population density, fiscal independence showed a correlation with the degree of decline. Second, there was a significant difference in the degree of decline according to the division of the metropolitan area, the Special Metropolitan City/a Metropolitan City/Do, and Si/Gun/Gu. In particular, the degree of decline of Gun and Gu was higher than that of Si. Third, in terms of decline characteristic, large cities with a high urbanization rate showed a high degree of the building decline indicator, and in the provincial cities with a low urbanization rate, the degree of the population decline indicator was high. And industrial indicator showed a high decline in the Special Metropolitan City and a Metropolitan City. Based on the analysis results, implications for effective urban regeneration policy implementation in terms of performance management and budget support were proposed.