Spraying device and spraying system

The utility model discloses a spraying device and a spraying system.The spraying device comprises a spraying liquid storage assembly, a conveying assembly, a control assembly and an atomization spraying assembly, the spraying liquid storage assembly comprises a spraying liquid storage tank, and the spraying liquid storage tank is provided with a spraying liquid outlet; the conveying assembly comprises a metering conveying pump, the metering conveying pump is provided with a stroke regulator, a liquid inlet and a liquid outlet, and the liquid inlet is connected with the spraying liquid outlet; the atomization spraying assembly is connected with the liquid outlet; the control assembly comprises a first variable-frequency governor, a timing switch and a time delay switch, the first variable-frequency governor is connected with the metering conveying pump, the timing switch is connected with the first variable-frequency governor, and the time delay switch is connected with the timing switch and the discharging sw