A water jet device and a water dance speaker comprising the water jet device are disclosed. The water jet device comprises a base container, a drive unit and fans driven by the drive unit, the drive unit being mounted externally to a bottom of the base container, while the fans internally to the bottom of the base container. A cover plate, disposed on the base container to engage therewith, comprises via holes thereon and coordinates with the base container to form a chamber to contain liquids. On the side of the cover plate away from the base container are formed protrusions vertical to the cover plate, a first via hole penetrating each of the protrusions. The present invention provides a water jet device capable of recycling water resources and preventing water leak. Therefore, the water jet device as disclosed is safe in use and possesses practical applicability.