Increasing growth of Population and human needs will necessitate planning and management of water resources more than before. One of the most important sources of water supply, especially in arid and semi arid areas, are the underground water table. One of the most important ways for proper and efficient management of water resources, are identification and zoning of new resources and extraction according to theirs capacity. The aim of this study is determination and introduction the best areas to optimize utilization from groundwater resources in the Romeshgan basin using effectives factors in nutrition of groundwater GIS technique. For this subject we use 7 factors countain slope, landuse, rainfall,fault, litology, Waterways,elevation and provide potential of water ground resources with GIS. The results show that we can be observed 2 different potential regions in this basin. The east and west regions have high potential for nutrition of groundwater and central regions have low potential.