The utility model discloses an electric power outdoor cabinet temperature control system. The system comprises an equipment cabinet for placing components, an air cooling module for air exchange and an air conditioner for maintaining temperature constancy are disposed on the equipment cabinet, and the air cooling module comprises a ventilation fan and a shutter structure with an automatic opening and closing function. The system is advantageous in that when environment temperature is too high or too low, excellent temperature adjustment performance is always achieved, and the level of protection is also raised; when the fan stops working, the inside of the equipment cabinet is at a sealed environment, and with a double radiating system, the reliability is high. In addition, the system can heat by using the air conditioner, the temperature inside the cabinet is proper and is higher than the temperature outside the cabinet, and when the environment temperature is too high, the heat dissipation performance is greatly reduced.