Salt is the raw material of sodium metal, which reacts with water to produce hydrogen for power generation. Sodium metal is solid matter and its specific gravity is low; therefore, it can be stored or transported for long at room temperature and under atmospheric pressure as oil and coal can. Sodium metal is produced with molten-salt electrolysis from sea salt, lake salt or rock salt, and securely kept immersed in kerosene for preventing it from reacting with air or moisture when transported to a consumer place; where it reacts violently with water to generate a large amount of hydrogen instantly. And sodium hydroxide, which is a reaction residue obtained after the production of hydrogen, is supplied as it is as the raw material of soda industries. Moreover, fresh water, sulfuric acid, hydrochloric acid, sodium hydroxide, and magnesium are generated as by-products in the processes of manufacturing sodium metal and generating hydrogen. Sodium metal can be an alternative energy material for hydrogen combustion power generation, having a far-reaching economic effect.