At last , this paper combines the reasonable distribution of water resources with social economy development and ecology environment protection . from the angle of system analysis , the multi - objective analysis model , macroeconomy model , optimization and simulation water system model are presented . macroeconomy water resource system is optimized and simulated from different time with methods of combining optimization with simulation technology and quantitative with qualitative analysis 最后將水資源合理配置、社會經濟發展、生態環境保護緊密結合起來,從系統分析的角度出發,建立了王益區水資源合理配置多目標分析模型、宏觀經濟模型和水資源系統優化模擬模型,用優化與模擬技術相結合、定量與定性分析相結合的方法,從不同時間層次上對宏觀經濟、水資源系統進行了優化和模擬。