A circuit structure of a gas valve controls a first driver and a second driver, which respectively drive a main valve and a safety valve. The circuit structure includes a power switching circuit, a control circuit, a protection circuit, an abnormal voltage detection circuit, a first valve switching circuit, a second valve switching circuit, and a processor which is electrically connected to the aforementioned circuits. The processor receives abnormal signals outputted by the abnormal voltage detection circuit, and outputs signals to control the power switching circuit, the control circuit, the protection circuit, the first valve switching circuit, and the second valve switching circuit to control the first driver and the second driver. The main valve and the safety valve can be opened or closed in this way.