Abstract: This experimental device is composed of humidity-sensitive sensing characteristic test, application of training and power supply unit, where the application training unit includes humidity sensitive signal acquisition and single-chip microcomputer control, warning and load control, hardware design and software program design. This design has completed the selection of humidity sensor, voice module, flash buzzer, stepper motor, atomizer, solenoid water valve and other devices; Softwares were used to draw the 3D model diagram, CAD diagram and Sch diagram of the prototype, and Keil software was used to write the experimental program. The functional prototype components were fabricated, assembled and debugged. This design can not only test the humidity-sensitive sensing characteristics and also implements the rain/humidity of the air/soil moisture sensors will collect information transmitted to the microcontroller via the interface circuit for processing interpretation, a feedback instruction flash buzzer/voice warning, synchronous open the ultrasonic atomizer, electromagnetic water valve and stepper motor, water atomized humidifying, drip irrigation and solar panels flat display operation.