| Due to the rapid pace of urbanization and industrialization, the ecological cost and environmental contamination in China has reached a critical level. Particularly regional air pollution problems like acid rain, dusty haze and photochemical smog have already become a key factor holding back the development of region's sustainable economic growth. Power industry, especially thermal power industry contributes a large ratio of air pollutants that released in to the environment. How to achieve the goal of reconciling development of electricity and economy with the environment is a vital problem to be resolved for ecologist and environmentalist.In this paper, the basic theory of electricity ecosystem was first put forward, and taking Guangdong province as a case, the growth feature of electricity, environment and economy subsystem has been analyzed. The econometrics method and the quality of atmospheric environment model have been utilized to analyze the quantitative relation of electricity subsystem and economy subsystem. An evaluation method for coordinating electricity ecosystem has been built and applied. An optimization solution for development of power industry in Guangdong Province has been proposed by using the qualitative and quantitative methods, and advices have been provided on adjusting electricity ecosystem policies.The main conclusions are as follows:(1) Taking the electricity production, consumption chain as the core and the social economic activities related to electricity as the important content. Electricity ecosystem is a human social ecosystem. Electricity ecosystem that turned itself to the ordered states from the disordered states is a complex system that formed in the interactions among electricity, environment and economy.(2) From1978to2010, the growth of gross domestic product and total industrial output value is the driving factor of the growth of total electricity consumption, but not vice versa. Proper inhibiting excess development of electricity consumption might not prevent the growth of economy development. There is a long-term and stable relationship between electricity consumption and economy development, when gross domestic product and industrial gross output value grows1unit separately, the electricity consumption of the whole province will increase0.97and0.64unit respectively.(3) Compared to2006, both the emission amount of air pollutants and proportion of the total emission of power industry in Guangdong province have different degrees of decline in2009. but power industry is still one of the main sources of air pollutants emission in Guangdong province. Power industry has slightly impact on air pollutants concentration distribution in2009, power industry is the main reason of environment degradation. (4) From2000to2010, the process of Guangdong electricity ecosystem is decreasing firstly and then rising steadily, the nadir is in2004. This ecosystem is turning itself to the ordered states from the disordered states.(5) In the future, coal thermal power plant still plays a significant role in the power plant development. Coal thermal power plant should be distributed mainly in the coastal areas of the east and west wings. Under different economic growth rate, the coal thermal power capacity will top17,220-17,840megawatts and19,060-28,010megawatts during the12th Five-Year Plan period and the13th Five-Year Plan period.(6) The thermal power plant in Guangdong province should be constructed based on optimized scenario put forward in this paper. If economic growth rate reaches8percent, the1st optimized scenario should be applied, the2nd optimized scenario will be used if reaches10percent. The electricity ecosystem adjusting policies should be perfected by electricity subsystem and environment subsystem.
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