Cantilever water curtain wall device and system

The utility model relates to a cantilevered water curtain wall device and system.The cantilevered water curtain wall device comprises an installation unit, a water spraying unit, a liquid storage unit and a liquid conveying unit, and the installation unit is arranged on the outer side of a building structure and fixedly connected with the building structure; the water spraying unit is arranged in the mounting unit and is fixedly connected with the building structure; the liquid storage unit is arranged on the ground of the outer side of the building and located under the water spraying unit. The liquid conveying unit is fixed to the bottom of the liquid storage unit and connected with the water spraying unit. The water spraying device has the advantages that the mounting unit is arranged, and the water spraying unit is hidden at the overhanging position of the building structure, so that water flow is far away from the building facade while the attractive appearance of the building facade is guaranteed, a bui