The invention discloses an intelligent power-saving device and method for municipal facilities and characteristic parks. The intelligent power-saving device comprises an intelligent power-saving device shell, a sealing door, a hinge, a door lock, a base, an intelligent power-saving device body, a first clamping plate, a second clamping plate, a fixing frame, a semicircular clamping plate, an anti-skid pad, a second reinforcing plate and a sliding hole. A hinge is fixed on one side of the intelligent power-saving device shell through a screw; a sealing door is fixed on one side of the hinge through a screw; and the sealing door is positioned on one side of the intelligent power-saving device shell. The intelligent power-saving device and method for municipal facilities and characteristic parks are easy to operate, the original five-dimensional big data information complete processing capacity is achieved, and the functions of five-dimensional big data acquisition, transmission, storage,analysis, comparison, disposal, visualization, prediction, alarm and the like are achieved. All the collected data are transmitted to a software provider through the proprietary cloud, data storage and analysis are conducted by the software provider, and results are sent to a designated mailbox or a designated mobile phone.