The invention discloses an electric power outdoor cabinet temperature control system which comprises a cabinet for containing devices. An air cooling module used for gas exchange and an air conditioner for maintaining the constant temperature are arranged on the cabinet. The air cooling module comprises a gas exchange fan and a shutter structure having automatic opening and closing functions. The electric power outdoor cabinet temperature control system has the advantages that when the environment temperature is too high or too low, the electric power cabinet temperature control system has the good temperature adjusting function, the protection grate is greatly improved compared with a mode, when the fan stops working, the interior of the cabinet is a sealed environment, double radiating systems are arranged, and therefore reliability is higher. In addition, according to the electric power outdoor cabinet temperature control system, the air conditioner can be used for heating, the temperature in the cabinet is proper and higher than the air temperature outside the cabinet, and when the environment temperature is too high, the radiating performance is greatly reduced.