In order to develop a generally applicable evaluation system for regional water environment carrying capacities, databases, geographic information systems and visual programming technology were employed and an intelligent evaluation system platform of water environment carrying capacity was developed. The overall designs and functions, as well as the structure of evaluation system for regional water environment carrying capacity were also introduced. This system is effective not only for the calculation of water environment carrying capacity in present conditions, but also for the capacity prediction in the future, including the spatial distributions. The application in the Guanzhong region of Weihe River basin showed that this evaluation system is a useful tool for evaluation and prediction of regional water and environmental carrying capacity.
