In this study, 21 indicators, which constitute an assessment framework of sustainable development, were drawn from the ecological, environment, society, and economic subsystem. The degree index of sustainable development (DI) was first put forward and was calculated by weighting the indicators. We assessed the DI of She County, Sun Village, and Tong-ling City in Anhui Provence. The result showed that the Tong-ling City characterized the highest sustainable development level. And Sun Village performed strongest sustainable development ability.