The exploitation and management of water resources has been the most important policy of government, especially, the monitoring of water quality, divided into northern, central and southern regions, is executed by certified companies. Nowadays, the database of water periodical quality including rivers, reservoirs, groundwater and seas has been collected for years by EPA for elementary statistics and analysis. This system has integrated complete processes of water quality of Quality Assurance/Quality Control via serial science reasonable examination, such as report examination of sampling and laboratory, filtering out of extraordinary data, and assist function of censor meeting to promote the quality and management during the process. Furthermore, the system not only exchanges data from other units also displays the spatial distributing, advanced statistical analysis and unusual warning of water quality with friendly and graphical users’ interface(GUI). All of the information is very valuable and necessary for decision support in time. The goals of this system are 1.Accomplish the Quality Assurance/Quality Control process, statistical analysis, GIS application of water quality for enhancing the database. 2.Display the sequential and spatial data of water quality in a interactive GIS based on internet technique. 3.Establish an inquiry system and database center including quality and quantity of water among administrations.

WEB GIS,Water Quality,QA,QC,Integration