Abstract: An intelligent light supplement device, video apparatus, and an intelligent light supplement method are disclosed. The intelligent light supplement device includes a light source input module, a light source computing module, and a light source output module. The light source input module has a light sensing unit, which receives an ambient light source. The light source computing module is electrically connected to the light source input module, compares the ambient light source with a content of an illuminance comparison table to generate an illuminance control signal corresponding to an apparatus illuminance value, and/or compares the ambient light source with a content of a color temperature comparison table to generate a color temperature control signal corresponding to an apparatus color temperature value. The light source output module has a light emitting unit and drives the light emitting unit according to the illuminance control signal and/or the color temperature control signal.