An automate fluid flow control system includes a relief valve for being sealedly disposed within a fluid chamber in an immovable manner to seal a flow of fluid flowing from a fluid inlet to a fluid outlet, and an actuator. The relief valve has a fluid passage for controlling a flow rate of the fluid passing from the fluid chamber to the fluid outlet, and a valve stopper sealedly closing the fluid passage for controlling the fluid flowing from the fluid chamber to the fluid outlet, wherein the valve stopper is driven to move between a closed position that the valve stopper is sealedly retained to close the fluid passage for blocking said fluid passing to the fluid outlet, and an opened position that the valve stopper is moved to unseal the fluid passage for allowing the fluid passing to the fluid outlet through the fluid passage.