A system and method using a switch to realize light fixture dimming and state restoration. The system comprises a switch, a line voltage sampling module, a switching action judging module and a dimming control module. The switch connects to at least one light fixture. The line voltage sampling module samples a rectified line voltage output and outputs a corresponding voltage level signal. The switching action judging module identifies and determines a current switching action and outputs a corresponding control instruction to the dimming control module. The dimming control module regulates the lighting state of each light fixture or controls each light fixture to return to its initial lighting state. By identifying and judging switching actions to realize light fixture dimming and state restoration control, the invention can realize a regular dimming function, and can quickly restore the light to a preset initial lighting state.