The invention relates to a valve controller based on ZigBee communication technique and a control method, belonging to the water saving irrigation automatic control system, wherein the valve controller is composed of a adjustable power radio frequency and central control module, a valve control module, a water pressure acquisition feedback module, a project installment debugging module and a power supply unit, the power supply unit has three power supply paths while a 3.3V power supply is normally opened, a 5.5V power supply and a 500mA large current power supply controlling the switch of an electromagnetic valve can be turned off, the control center and the valve control nodes form a ZigBee net communication, the radio frequency is adjustable according to distance. The invention uses a working mode of integral awake and integral dormancy for the valve controller to switch the electromagnetic valve and feedback information. The invention has ultra low power consumption, can realize ZigBee communication after using a battery, and has high reliability, high safety, simple installment, simple debugging and intelligent water quantity measurement. The invention can give full play to the advantages of mulch drip irrigation technique and is beneficial for engineering realization.