Abstract: DRAMTICH,a groundwater vulnerability assessment index system is established based on MapGIS in this paper.The software(GW-VAS) for groundwater vulnerability assessment system,whose basic framework,main function,component parts,characteristics and usage are put forward in this paper,is set up on the basis of geographic information system MapGIS made in China.The other methods of groundwater vulnerability assessment,such as DRASTIC,are also used in the GW-VAS system.The assessment system becomes more objective,scientific and practical because it contains many other current-used groundwater vulnerability assessment methods.The Huangshuihe river catchment is taken as an example,in which the traditional weight rating method and entropy weight Fuzzy optimization were used.The results show that the system is of high applicability.