Two-electrodes of moisture sensor is proposed in this work. This sensor overcome the problem of electrical control of soil moisture affected by salts, while this can not be accomplished by other types of sensors. The moisture content is transformed to resistance measurement, which is translated to a computer as volt value by transmission circuit. Obtaining the sensor input/output characteristics does the investigation of the soil moisture sensor. A comparison between the two-electrode sensor and ELE in salty soil was carried out. Soil moisture content is established in real time closed loop control, where the feed forward path is composed of relay element; the feedback path consists of a moisture sensor followed by a moisture transmitter. The ON-OFF moisture control and moisture control system identification is established via personal computer. The two-electrode moisture sensor type is very simple and cheap. The field experiment indicates that the major advantage of this sensor can be used in widely salty soil.