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This study implemented an independent decentralized water system with minimized wastewater discharge and maximized water reuse in water deficient region.Dual-quality wastewater reclamation and reuse system with parallel conventional treatment unit and advanced MBR treatment unit was built in which the reclaimed water with normal quality and high quality was produced respectively.The minimum-emission scheme characterized by high cycling rate of the limited water resource was formed based on adopting maximum collection of the re-collectable discharged water and consequently all the non-potable water consumption was covered by the reclaimed water.Environmental lakes which burdened multi-functions of quantity regulation and quality stabilization of the reclaimed water were introduced in the system configuration and stepwise use of the reclaimed water was realized successfully.As a result of the system operation,main pollutants were removed very well and the quality of reclaimed water can reach the demands of various non-potable reuse purposes.Water bodies in the campus appeared well quality condition of surface water environment.The project accomplished the minimum emission of discharged water and maximum use efficiency of water resource.It was proven to be feasible based on the technical and economic evaluation.This study provided a model case for future urban development in the water deficient region.