中文摘要：

通过近20年生态经济系统各能值指标的分析研究表明：青海省环境负荷率低、废弃物占总能值使用量的比也较低，人口承载力目前略高于下限，远远低于上限，说明经济发展引起的环境污染相对较低，人口压力相对较小，人类活动引起的生态环境演变处在可以接受的范围内；青海省净能值产出率、能值投入率、能值使用强度、能值／货币比率等指标的变化趋势表明：工业化和信息化水平低，经济开发强度和发展水平低，且系统运行主要依赖本地资源，是一个资源输出型的省份；很高的可持续发展指数，表明经济不发达，开发程度很低，但同时也说明青海省是一个有较大开发潜力的地区。并从能值分析的角度提出实施可持续发展的对策。

英文摘要：

This paper, through analysis of every Energy- value index of Qinghai eco- economy system in recent twenty years, disclosed the following results： there is the low environmental loading ratio, waste accounts for the lower percentage of total energy - value use quantity in Qinghai, and population loading capacity is a little higher than the lowest limit,but far lower than the upper limit. Those indicate that pollution caused economy development during the period is relative low, the pressure of population is smaller, the environmental change leading to human activities may be received; also, change tendency of pure energy- value output ration, input one, energy- value use intensity and the ratio of energy - value and currency, etc. show the level of industrialization and information, the one of economic exploit intensity and development are all low, and the system normal work depends on the local resources in Qinghai, then it is a resouroes output province, so, the fairly high index of sustainable development indicates that the economy is not developed in Qinghai province,the exploit extent is fairly low, and there is greater potential to develop in Qinghai province. And then suggestions are discussed for the sustainability of Qinghai environmental - economic system.