A methane or methanol producing system is proposed in which laser beams are generated
in space by excitation of sunlight, transmitted onto land or sea without loss to
obtain optical energy with high efficiency, and irradiated on a hydrogen producing
device to produce industrially inexpensive hydrogen with high efficiency, thereby
producing methane or methanol. A laser generating device for generating laser beams
by exciting radiant light in laser rods by irradiation of sunlight is installed
in space. The laser beams generated are transmitted to a light-receiving facility
on land or on sea, and irradiated on a hydrogen generating device having a semiconductor
electrode with a wavelength suitable for absorbing by the semiconductor electrode
or by converting or shifting to a suitable wavelength. Using the hydrogen, methane
or methanol is produced by a methane or methanol producing unit.
