Abstract: The rice field intelligent irrigation system was established based on STM32 controller. Taking STM32 main control module as core component of the system，each module was coordinated and controlled. Cortex-M3 processor core could minimize power consumption and achieve faster response speed by using standard interrupt architecture. Wireless ZigBee network connection technology helped the system to achieve intelligent operation. The simulation test showed that the system had low-cost，low-consumption and high-performance and high practical value.