Surface　water　pollution　is　one　of　the　greatest　environmental　problems　faced　by　large　cities　in　China.　Therefore,　it　is　an　important　mission　for　these　cities　to　enhance　water　environmental　management,　as　well　as　preventing　and　remedying　water　pollution.　With　the　worsening　of　water　quality,　there　is　a　stricter　requirement　for　water　environmental　management　in　cities　and　the　relative　areas.　Consequently,　the　method　of　digital　management　is　very　requirement　and　development　trend　of　regional　environmental　management.　For　systemically,　speedy　and　effectively　to　improving　the　surface　water　quality　and　urban　environmental　quality,　within　the　article,　urban　water　quality　information　management　system,　based　on　Visual　Basic　6.0,　is　explored　and　constructed　on　Arc　GIS　platform　by　the　secondary　exploitation　of　Arc　Engine　geographic　information　system.　This　article　briefs　the　objective　and　constitution　of　these　subsystems,　and　introduces　the　function　of　data　management　subsystem,　outfall　management　subsystem　as　well　as　water　quality　prediction　subsystem,　which　based　on　brief　introduction　about　the　aim　and　constitution　of　this　subsystem.　As　a　subsystem　of　urban　synthetically　information　system,　an　urban　water　environmental　information　management　system　based　on　GIS　and　is　also　a　complicated　system　relating　to　many　social　aspects.　Moreover,　the　construction　and　the　process　of　the　system　have　quite　reference-valued　for　the　implementation　of　digital　environmental　management　and　reforming　the　water　environmental　quality　in　many　cities.　©2009　IEEE.