Abstract: In order to real-time measure, process, visualize and upload soil moisture data, a mobile soil moisture monitoring system was developed. The system consisted of a PDA integrated with ZigBee coordinator, GPS module, GPRS module and mobile soil moisture sensor nodes based on ZigBee. The ZigBee module is mainly used for wireless communication between PDA and mobile sensor nodes, so that the PDA is able to obtain sensor information, and control the sensor's power supply. The GPS module is used to obtain latitude and longitude information so that the spatial map of the field soil moisture can be drawn. The GPRS module is used to upload the binding information of the node number, latitude and longitude information, soil moisture information to the remote PC through TCP/IP protocol. The data can be stored in the PDA or upload to the website. It has good portability and visibility.