A sprayer includes a sprayer casing, a power module and a spray nozzle. The sprayer casing is configured to contain a liquid. The power module is connected to the sprayer casing and is configured to energize the liquid in the sprayer casing, so that the liquid carries a first charge. The spray nozzle is connected to the sprayer casing and is configured to atomize the liquid with the first charge and spray it onto the external object with the second charge. The first charge and the second charge are opposite. The sprayer of the present invention has an excellent atomization effect and an improved the utilization rate of the atomized liquid.