Eco-environment evaluation index system includes many indexes,and the result of evaluation should re- flect the spatial pattern of regional eco-environment. In order to analyze and evalute eco-environment in Hunan province,this research used the combination of geographical information system(GIS) with AHP. The mathemat- ical methodology for study on eco-environment was explored and developed. This research focused on the analysis of eco-environment in Hunan province. Firstly,this paper set up the eco-evironment indexes system based on the eco-evironmental characteristic of Hunan province. Secondly,calaculating the weight of each selected indexes and the value of each evluation cell by AHP. Finally,got the synthetic eco-environment evaluation result map of Hu- nan province by GIS. It found that eco-environmental quality of Hunan province decreases from east to west. With exception in a few areas, the spatial pattern of society economic and eco-environment is consistent with that of natural environment. It indicates that natural factors determine the spatial pattern of eco-environment of Hunan province. However,some other factors also affect the eco-environment and influence its spatial pattern in some cases,such disasters, pollution and society and economic.