NOVELTY - Generating (M1) power involves dissociating water to form a hydrogen and oxygen gas and transferring to a combustion chamber of a boiler; and heating a liquid flowing into a boiling chamber by the heat generated in the combustion chamber to produce a vapor for outputting as power source.    USE - For generating power (e.g. vapor power) (claimed) that can be used to rotate turbines to generate electricity or it can be used in engines to generate mechanical power.    ADVANTAGE - The process and system utilizes water as a raw element to produce hydrogen and oxygen gas as fuel gas to generate vapor power, which is environmental friendly, renewable, stable and economical power source; requires only a small energy input to produce a great amount of heat, such that the energy efficiency of the process is maximized; and catalyst used is not consumed and is therefore recycled. During power generation after driving the turbine, the steam can be condensed back to form recycled water that can be heated again to produce the steam again, resulting in minimizing cost of water consumption. The steam produced has a substantially higher temperature than the steam produced by conventional coal burning method.    DETAILED DESCRIPTION - Generating (M1) power involves: (a) dissociating water to form a hydrogen and oxygen gas; (b) transferring the hydrogen and oxygen gas to a combustion chamber of a boiler, where the hydrogen gas instantaneously combusts with the oxygen gas to generate heat in the combustion chamber; and (c) heating a liquid flowing into a boiling chamber arranged in a thermal-conduction manner with respect to the combustion chamber by the heat generated in the combustion chamber to produce a vapor for outputting as power source.    An INDEPENDENT CLAIM is included for a power generation system (S1) comprises a boiler for generating vapor power. The boiler comprises a boiler body surrounding a combustion chamber having a combustion agent inlet. The boiler body has a boiling chamber arranged in a thermal conduction manner with respect to the combustion chamber. The boiling chamber has a liquid inlet, via the combustion agent inlet. The combustion agent is guided into the combustion chamber, and combusts in the combustion chamber to produce heat which is conducted to the boiling chamber to boil a liquid flowing into the boiling chamber through the liquid inlet to a vapor that exits the boiling chamber via the vapor outlet.