The water potential of each region can be estimated through water balance methods such as Thund White. With the increase in population and the increasing development of industry and the endless discharge of urban wastewater, and climate change, in recent years has caused salinity of groundwater and salinity can be studied through the effective elements. In this study, 30-year statistics of climatic elements of Guilan province were prepared and studied through the climate change of stations and using the climatic elements of the water balance of Guilan province was also estimated. Water quality elements of wells have been prepared and classified for the last 16 years and the most effective elements in salinity of Nacl, Ec, Na, Cl, Sar were analyzed. As a result of climate change and mutations and the number of wet and dry years were estimated and arranged, interpolation was done through data, which is the most concentrated elements to the east of Gilan. According to Torrent White method, using the elements of precipitation and temperature, modified and unmodified evapotranspiration, excess water and soil moisture consumption of the province's power and water, the highest water power is related to groundwater in East Gilan. Also, the influential qualitative data on salinity were interpolated separately and finally, through the algebra icon in the gis environment, all quality maps were combined and the final map was obtained. Climate change map, water balance, salinity were almost coincident from Astana to Rudsar coast continues. Climate change (precipitation), especially by jumping in the negative and dry sector and the influx of elements affecting salinity and seawater due to the weakening of the boundary line between the Caspian Sea and coastal freshwater in East Gilan, increases the salinity crisis of groundwater.