A wake-up judgment apparatus for a generator includes a current sensing element and an electric charge processing element. A first terminal of the current sensing element is electrically connected to a power conversion circuit, and a second terminal thereof is electrically connected to an auxiliary micro power. The power conversion circuit provides power conversion and power transmission between the generator and a load, and the power conversion circuit is electrically connected to a main supply power. A first terminal of the electric charge processing element is electrically connected to a third terminal of the current sensing element, and a second terminal thereof is electrically connected to the auxiliary micro power, and a third terminal thereof is electrically connected to a microprocessor to output a wake-up signal to the microprocessor.