Lake Ecosystem plays a vital role in supplying water puriifcation service to the stakeholders. The water purification function is a combination of different biophysical and biochemical processes involving dissolution, sedimentation, biological absorption and biochemical reactions, which are affected by biological factors, environmental factors, socio-economic factors, and the ecological characteristics of the Lake ecosystems. Despite the important role lakes play in purifying the water quality, current research separately focus on two different aspects:the ifrst is integrating ecology, hydrology, and statistical methods to explore the potential pollutant sources for water quality deterioration, the spatial-temporal trend of water quality parameters, comprehensive evaluation of water quality, the mechanisms for water puriifcation, and the inlfuence of land use changes on water quality trend. The other aspect is accounting the value of water puriifcation service using diverse economic models .However, the separation of these two methods are limited in its use in guiding wise water quality management since we are lacking practical tools to connect human factors to ecosystem structures and process to economic value. This paper presented a detailed synthesis of the puriifcation function of Lake Ecosystem. The overall objective of this review is presenting a framework to assess the water puriifcation service in both biophysical amount and economic value, which can then provide guidance toward better lake ecosystem management.%湖泊水质净化服务是指湖底沉积物、植物、微生物通过生物物理化学作用，对污染物进行吸附、吸收、移出和固定，通过净化水质和改善生态环境为受益者提供的效益。国内外关于水质净化服务的研究虽日趋完善，但鲜有研究定量揭示生态系统过程对生态系统服务的影响，现有研究在管理决策中的应用仍有一定的局限性。在对水质净化服务形成机理和价值评估方法进行综述的基础上，提出了基于物质量和价值量评价的基本模式和框架，为湖泊生态系统监测和生态系统服务评价提供了重要的理论支撑。
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