Abstract: The present invention relates to a power generating window set and a power generating module thereof. The power generating module includes a light-guiding substrate and at least one photoelectric conversion element. The light-guiding substrate has a plurality of microstructures. The photoelectric conversion element is disposed adjacent to the light-guiding substrate. When a light beam illuminates the light-guiding substrate, the microstructures guide a part of the light beam to the photoelectric conversion element, so as to convert the energy of part of the light beam into electrical energy.