Ⅰ. Introduction
1. Background and necessity of research
oDue to population decline and low growth, changes in urban policy and eco-friendly smart shrinkage policy are necessary.
oA decrease in urban population causes various effects on urban economy and finance, as well as changes in land use.
ㅇThe decrease in city population led to the aggravation of financial conditions of many cities due to low tax revenues and high maintenance cost of infrastructure.
ㅇUN SDGs and UN Habitats emphasize that sustainable cities are the basis for human prosperity and survival and request plans for responding to socioeconomic changes and innovation in technology such as smart shrinkage.
oSmart shrinkage is an urgent task in government policies, including the Fifth Comprehensive National Plan (2020~2040) and the Fifth Comprehensive National Land Use Plan (2020~2040).
2. Purpose of research
oThis study aims to analyze the characteristics of shrinking cities in Korea compared to those abroad and to understand the mechanism of the shrinking city phenomenon.
ㅇA model of shrinking city will be built based on the mechanism of the phenomenon to observe the residential space usage, accessibility of public services, and financial change in the shrinking cities.
oAlso, this study aims to prepare the basis for sustainable cities that can improve quality of life through smart shrinkage and to present policies that can realize the plan.

Ⅱ. Concept and Case Studies of Shrinking City
1. Shrinking city phenomenon and smart shrinkage
oVarious research projects use population decrease as an indicator for shr