In order to promote the application of modern information technology in the field of management of salinealkali land and get an effective mean for evaluating improved effect on soil, a realtime information collection and control system was designed, including online underwater pipe monitoring subsystem, field microclimate monitoring subsystem, pest diagnosis subsystem, crop growth monitoring subsystem, and automation irrigation subsystem. And ZigBee multihop adhoc network was constructed for field data transmission. Based on the regional characteristics of Dongying Agricultural High Technology Zone, a cost function was defined in the comprehensive consideration of maximum network connectivity, robustness and timelines. And then, a global optimization deployment scheme for ZigBee network nodes was proposed with the maximum connectivity of the network. Meanwhile, a local data collection software with LabVIEW and the remote cloud service platform under Brower/Server structure were all achieved. The communication between local control software and remote server was achieved through TCP/IP, where the communication reliability was guaranteed by the mechanism of offline detection and reconnection. A large amount of monitoring data can be accumulated in the remote server, providing data support for the treatment of saline soil in the future. The system was put into use, the test showed that the system met the functional requirements of data monitoring and automation control for irrigation and fertilization, where monitoring data can be shown on the website in realtime and control commands can reach the correct actuator through the website quickly. Meanwhile, the communication test showed that the packet loss rate of the designed ZigBee network data transmission was less than 1%.