This article introduces the concepts of coordinated development of economy and environment and formulas of coordinated degree. Results obtained are that the coordinated degree in 1992 is over 0.87.The variation tendencies on coordinated development of urban environment and economy are forecasted upto the year 2010 in Guangzhou by adopting formula GM(1,1).It is considered that not only the index of environment quality in Guangzhou will come down to 0.31,but also coordinated degree which is equal to 0.64 will lower to middle level.Therefore, some effective countermeasures have to be taken to accomplish thecoordination development of urban environment quality and economy.
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