The invention belongs to the technical field of energy-saving ventilation, particularly relates to an intelligent ventilation energy-saving device and aims to provide an intelligent ventilation energy-saving device which is simple in structure and convenient to use, saves energy and protects environments. The technical scheme includes that the intelligent ventilation energy-saving device comprises a data acquisition module, a central processor, a solar power supply module, an alarm device, a background monitoring center and an exhaust fan controller, the exhaust fan controller is connected with an exhaust fan, an output end of the data acquisition module is connected with an input end of the central processor, the solar power supply module, the alarm device and the exhaust fan controller are connected with an output end of the central processor, and the central processor is connected with the background monitoring center through a wireless communication module. The intelligent ventilation energy-saving device is applicable to the field of electric power.