The invention belongs to the technical field of solar energy environmentally-friendly equipment, and particularly relates to a solar energy air exhaust fan. The solar energy air exhaust fan comprises a rotating device, air exhaust fan baffles, wires, a control device, an air exhaust fan front face, a switch, an air exhaust fan bottom face, installing holes, an air exhaust fan blade, a motor shaft, a motor, air exhaust fan side faces, an energy storage device, a photoelectric converting device and an indicator light. The air exhaust fan baffles are arranged on the air exhaust fan front face and connected with the rotating device, the control device is connected with the switch through the corresponding wire, and the installing holes are formed in the air exhaust fan bottom face. The solar energy air exhaust fan is reasonable in structure and high in pertinence, solar energy plates on the air exhaust fan baffles are utilized to absorb solar energy, luminous energy is converted into electric energy needed by the devices through the photoelectric converting device, and the solar energy air exhaust fan accords with environmentally-friendly and energy-saving ideas, has wide application prospects and is suitable for application and promotion.