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In order to realize the remote control of the solenoid valve and monitor the water pressure of the water conveyance pipeline,and improve the efficiency of irrigation in agriculture, a STM32 micro-controller and Android embedded system were used to develop a system of controlling solenoid valve and monitoring water pressure. The micro-controller through the serial port to connect the GPRS module to receive commands,and then control the solenoid valve and send water pressure data; Android phone client achieve the interface of controlling valve and display water pressure data; Cloud server is responsible for connecting the GPRS module and mobile client, and managing the underlying equipment and user information. The system has been applied in the experimental greenhouses of an intelligent water-saving irrigation company,the experimental results show that the system can carry out remote controlling and monitoring in real time, and ensure the normal operation of the water conveyance system. The system can promote the development of agricultural modernization, reduce labor costs, and improve production efficiency.