Abstract: SFA (substance flow analysis) method was used to analyze the wateruse system in NEU. The results showed that the current water consumption per person is 1067t/a， and almost no recycling water is used. Besides， the main pollutants in water include suspended substance and nitrogen/phosphorus pollutants， which can be removed by simple treatment process and the water recyclable. Based on the water quality inspection for different departments， an optimization plan was put forward to reduce the water consumption per person to 921t/a， and the total water consumption can be cut down by 137%， and the water drainage per capita can be reduced to 867t/a. Predictably， an amount of water saving can be up to 784×106t/a if some simple drainage equipments and plan are applied in all universities in the whole country， which would dramatically reduce the environmental pollution and water treatment costs.

Key words: SFA (substance flow analysis), waterpollution in single, daily water system, optimizing analyses, university campus.