Based on the domestic and overseas research of watershed environment management tech-niques,the technology system of water quality target management for the control units was presented and the con-notations and characteristics were discussed in this paper. Meanwhile, seven key techniques of the system, includ-ing the division of control units, environmental problem diagnosis, identifying of water quality objectives, con-struction of water quality models which is used to establish the response relationship between water quality and pollutant input, pollutant load allocation, pollutant emission reduction program, and pollutant load monitoring and evaluation are introduced. As a case study, the technology system of water quality target management for the control units was applied in Nansha River in Liaohe River basin successfully, and the total load allocation pro-gram was given, which can be used to provide technical support for the local water environment management.% 在研究国内外流域水环境管理技术的基础上，提出了控制单元水质目标管理技术方法，剖析了其内涵、特征，并全面阐述了控制单元划分、控制单元水质目标核定、控制单元水环境问题诊断、控制单元水质响应特征分析、控制单元允许纳污量计算与总量分配、控制单元污染物减排方案制订、控制单元污染物总量监控与评估7项核心技术环节。在此基础上，将控制单元水质目标管理技术方法在辽河流域南沙河控制单元进行技术示范，形成完整的技术方案，为流域水环境管理提供技术支撑。
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