Monitoring and predicting technology was studied in the present work. Water and salt movement history in a reclaimed salt soil was obtained by using the method combining field observation with numerical simulation. At the field site, monitored parameters include groundwater table and mineralization, soil salt and water content as well a sevapotranspiration. The numerical simulation was employed for the field conditions. In the work, mobile-immobile water concepts and absorption were taken into account. The results indicated that under the present natural and cultural conditions, soil salt in the test field can be kept balanc dynamically, so that the revival of soil salinization can be avoided.