In 1992, the United Nations reached a consensus about sustainable development to avert ecological crises such as climate change. Thereafter, the UN has strongly recommended ‘Local Agenda 21’ at the level of municipalities to solve global environmental problems. In this situation, Korea is regarded as a pioneer because it established the local agenda in advance of other countries. However, there have been few qualitative evaluations of a sustainable system for local agenda 21, while the sustainability of municipalities has been assessed quantitatively many times. In this context, this study attempted to qualitatively evaluate the sustainable scheme of local agenda 21 targeting the metropolitan cities in Korea. To accomplish the purpose, this study adopted an analytic framework consisting of three sectors: contents, procedure, and evaluation of agenda. The analysis result showed that Gwangju ranked first in sustainability, followed by Incheon, Ulsan, Daegu, Busan, and Daejeon. In conclusion, this study suggested policy implications to strengthen Korean sustainability nationally and locally.