The invention discloses an intelligent
irrigation instrument and an
irrigation method. The intelligent
irrigation instrument is provided with a
machine shell and a control part located in the
machine shell. And the control part comprises a light conversion module, a monostable circuit or a digital delayer, a discrimination and judgment circuit, an
NAND gate comprehensive
control circuit, a control instruction power
amplifier, a sound-light alarm generator, a radio receiving and decoding device and a coding radio
transmitter. According to the control instrument, an irrigation time window is automatically generated after natural
light detection, and irrigation is automatically carried out in the time window according to the
dryness and
humidity of soil. Through radio receiving and transmitting, irrigation parameters of the instrument can be remotely controlled, and the
water content condition of soil can be monitored. As the irrigation time of the intelligent irrigation instrument is early
morning, the optimal irrigation time of the plants is achieved. And as the time window and the
dryness and
humidity of the soil jointly control the opening and closing of the irrigation valve, even if the
dryness and
humidity are detected mistakenly, excessive irrigation and irrigation accidents can be effectively prevented.