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中文摘要：
利用PSR模型构建了西安生态安全评价指标体系，借助AHP法确定权重；采用1988年陆地卫星TM和2000年ETM＋影像确定模型中的自然组分数据，结合社会经济统计数据，利用ARCGIS9．0建立了生态安全评价数据库；对西安的生态安全动态过程进行了尝试性评价，得到了12年来西安地区生态安全的变化状况。研究表明：从1988年到2000年由于西安局部地区采取各种生态环境保护措施而收到良好效果，但是局部地区取得的生态环境保护成绩难掩大部分地区生态环境进一步恶化的趋势，整体的生态环境状况有所下降。
英文摘要：
The Xi＇an ecological security evaluating indicator system was constructed using the PSR model, with the aid of the AHP determination weight, using Landsat TM （1988）, ETM ＋ image determination natural component data （2000） and social economy statistical data, the ecological security evaluation database was established using ARCGIS9.0. The experimental evaluation to Xi＇an＇s ecological security dynamic process was carried on. 12 years of Xi＇an area ecological security change situations were obtained. The research indicated： from 1988 to 2000, because of the implication of ecological environmental protection measures in some part of Xi＇an region, it received some good results, but the good results were difficult to cover the tendency that ecological environment in some districts became worsely, the overall ecological environment condition declined.
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