An animal repelling device includes a container, an end cap provided with through holes, a liquid level sensor and a wireless communication component. An animal repelling method includes: injecting volatile liquid for repelling animals in the container, and closing the end cap, in which the volatile liquid is vaporized to the outside; and detecting the liquid level through a liquid level sensor, and transmitting liquid level information to a wireless communication component, and controlling the vaporization of the volatile liquid via the wireless communication component. the vaporization of drugs for repelling animals can be intelligently controlled; and the remaining amount of the drugs for repelling animals can be automatically monitored to replenish the drugs in time.