Abstract: Based on the AHP method and the Gray theory, the change and driving forces for eco- environmental quality of Jiangsu Province, China are studied. Some conclusions are drawn as the followings. ( 1)The maximum and minimum indexes of eco- environmental quality of 11 cities of Jiangsu Province appear in different time, which shows the regional character. ( 2)The eco- environmental quality of Jiangsu Province is meliorated as a whole in 1990s??. ( 3)The mechanism of eco- environmental quality change of 11 cities of Jiangsu Province is different. ( 4)The main factors driving the eco- environmental quality of Jiangsu Province come from nature, populat ion growth and its pressure on the land.In a word, this research is useful to improve and manage the eco- environment of Jiangsu Province.

Key words: eco- environmental quality, Jiangsu Province, driving forces