Surface science and surface technologies are reviewed from the view point that the traditional technologies for mining energy resources are “one-dimensional.”on the cther hand, the technologies applicable to “cultivate” recycle-energy are regarded as “two-dimensional”, that is surface technology. Nuclear fusion energy is essentially “three dimensional.” Typical examples of surface technology are: the selective coatings for solar heat collection, photoelectrochemical water-decomposition methods, the new power system composed of the electrolysis of HBr by solar cells, and the electric generation by the H₂-Br₂ fuel cell. The water-decomposition catalytic chemical cycles, such as EURATOM mark 13 and YOKOHAMA mark VII are introduced emphasizing the materials aspects. Most of the above are the current topics of innovative technology for new energy development.