The industrial eco- efficiency is an important indicator of the level of sustainable development of urban industry. This essay establishes urban industry eco - efficiency input- output index system based on DEA Model, and measures Hunan City' s industrial eco - efficiency during 2008 - 2012. The results show that: the overall level of Hunan urban industrial eeo - efficiency is relatively low, and the average efficiency value is only 0. 758. There is a larger gap between regions that the east and north of Hunan are higher than the west and sou...