Entropy and urban industry-environment system

The model of generalized excess entropy production criterion of the urban industry-environment system was presented, which reflected the relationship of the investment on environmental protection, the environmental capacity and the state of the industry-environment system. The data of industry-environment system in Baiyin area (China) were used to verify the model. Results well reflect the real situation of area, and only the chemical industry among the four industries under research is in its unstable state. To boost the system into a high level state, the rates of the investment on environmental protection should rise by 0.2273%, 1.21% and 5.508% respectively, corresponding to the mechanical industry, the textile industry and the metallurgical industry in Baiyin area.