Abstract: The Yangtze River Delta is one of the important regions with economic development. Based on the industrial data of 35 cities from 2010 to 2013 and by decomposing industrial ecosystem into industrial economy, environment, energy three subsystems, the paper evaluates the efficiency of 35 urban industrial ecosystems and three subsystems by use of network DEA model. The results show that, in the case of industrial economic subsystems, the industrial economy is highly efficient area forming “M”,which is centered on Shanghai and other cities; in terms of environmental subsystems, the cities with high environment efficiency are centered on Taihu, along the Yangtze River and Hangzhou Bay area; in terms of energy subsystems, Shanghai, Suzhou and other cities have high energy efficiency, energy efficiency of other cities is low and the difference of efficiency level is small; in terms of industrial ecosystem, industrial eco-efficiency of urban agglomeration in the Yangtze River Delta shows three steps.

Key words: industrial eco-efficiency, industrial eco-system network architecture, network DEA, urban agglomeration in the Yangtze River Delta