1. A coolant replenishment device, adapted to be connected to a circulation pipe having a circulation channel, comprising:a liquid storage tank having an accommodating space and a liquid outlet, the liquid outlet communicated to the accommodating space, and the accommodating space configured to accommodating a coolant for replenishment;
a push plate movably located in the accommodating space and movable in a direction toward or away from the liquid outlet; and
a driving member disposed in the liquid storage tank and constantly applying a force on the push plate in the direction toward the liquid outlet so as to force the push plate to move toward the liquid outlet to push the coolant out of the accommodating space,
wherein the coolant replenishment device further comprises a valve and a connecting pipe, the valve is pivotably located in the accommodating space, the connecting pipe has a connecting channel and a first opening, the connecting channel is optionally communicated to the accommodating space through the first opening by opening or closing of the valve, the connecting channel is configured to be communicated to the circulation channel of the circulation pipe, and the valve is located between the push plate and the first opening of the connecting pipe.