Today, one of the problems of water resources is the invasion of salt water into fresh aquifers due to increased productivity and developments. This research has physically and qualitatively investigated the exploitation status of Sarayan Plain due to the advance of salt water from the desert. In this part of the mentioned plain, with the continuation of the current process of withdrawal from underground water resources and the scenarios of reducing and increasing the amount of productivity, it has been simulated and predicted. For this purpose, MODFLOW model was used to simulate the quantitative situation of the aquifer. Then, using the MT3DMS package, the qualitative model of saltwater invasion was simulated and predicted using the SEAWAT model. Quantitative modeling results showed that the highest saltwater intrusion occurred in the southeastern region of the aquifer at a level of 750 meters. And the concentration of salt in productivity wells has increased by 160 mg. On the other hand, the results of the scenarios showed that with a 5% reduction in the pumping of wells, it will reduce the invasion of salt water fronts by 700 meters, reduce the advance of salt water by 1200 meters, and increase the salt concentration by 464 mg/liter. On the other hand, a 15% decrease in extraction from these wells will be due to a drop in the water level to 600 meters and an increase in salt concentration to 82 mg/liter.