NOVELTY - A water hydrogen energy self-powered system comprises wind power generation unit, solar power generation unit, methanol power generation unit, rechargeable battery, charging unit, methanol storage unit, biogas alcohol production unit, hydrogen alcohol production unit, electric hydrogen production unit, and master control unit.    USE - Water hydrogen energy self-powered system.    ADVANTAGE - The water hydrogen energy self-powered system is energy-saving and environment-friendly, and can control energy storage and output according to power generation capacity and power consumption so that fully utilization of energy is facilitated further.    DETAILED DESCRIPTION - A water hydrogen energy self-powered system comprises wind power generation unit, solar power generation unit, methanol power generation unit, rechargeable battery, charging unit, methanol storage unit, biogas alcohol production unit, hydrogen alcohol production unit, electric hydrogen production unit, and master control unit. The methanol power generation unit comprises solid-state hydrogen storage container, quick starting device, liquid storage container, raw material conveying device, hydrogen production equipment, membrane separation device and hydrogen generation device. The hydrogen production equipment comprises heat exchanger, gasification chamber and reforming chamber. The quick starting device comprises first and second starting devices. The first starting device comprises first heating mechanism and first gasification pipeline. The second starting device comprises second gasification pipeline arranged in the reforming chamber. The reforming chamber wall is provided with heating pipeline containing catalyst. The catalyst comprises 0.6-1.8 wt.% platinum, 1.1-4 wt.% palladium, 6-12 wt.% copper oxide, 3-8 wt.% iron oxide, 8-20 wt.% zinc oxide, 6-40 wt.% rare earth metal oxide and balance transition metal oxide; or 3-17 pts. wt. copper oxide, 3-18 pts. wt. zinc oxide, 0.5-3 pts. wt. zirconium oxide, 55-80 pts. wt. alumina, 1-3 pts. wt. cerium oxide and 1-3 pts. wt. lanthanum oxide. The hydrogen generating device is connected to hydrogen plant comprising direct current electromagnetic heating device. The direct current electromagnetic heating device comprises electromagnetic reforming cylinder, separating cylinder, first reforming heating coil, second heating coil, temperature sensors, pressure sensors and electromagnetic controller. The separation chamber comprises membrane separator, i.e. palladium silver alloy vacuum plated on porous ceramic surface membrane separator. The palladium silver alloy comprises 75-78 wt.% palladium and 22-25 wt.% silver. The hydrogen plant further comprises electric energy estimation module, hydrogen production detection module and electric energy storage module. The hydrogen generating device comprises fuel cell system. The fuel cell system comprises gas supply device, electric reactor, gas inlet and outlet pipes, gas conditioning system, and humidification system. The gas condition system comprises valve regulating and controlling device, and oxygen content sensors and/or compressed gas compression ratio sensors. The humidification system comprises humidity exchange container and humidity exchange line. An INDEPENDENT CLAIM is included for supplying power to water hydrogen energy self-powered system comprising:    (A) providing power to wind power generation unit, solar power generation unit and methanol power generation unit by connecting to electrical equipment which is directly connected to power supply;    (B) turning on master control unit to acquire real-time electricity use demand data of electrical equipment and real-time power generation capacity data of wind power generation unit, solar power generation unit and methanol power generation unit;    (C) controlling charging unit when power generation capacity data are greater than the electricity use demand data, and supplying residual electric energy to the rechargeable battery for charging; and starting rechargeable battery to supply power to the electrical equipment when power generation capacity data are less than the electricity use demand data;    (D) starting hydrogen alcohol production unit when remaining data reaches set high value;    (E) starting water electrolysis of hydrogen in electric hydrogen production unit to produce hydrogen and oxygen, feeding hydrogen to hydrogen alcohol production unit, and reacting with carbon dioxide to obtain methanol;    (F) stopping methanol power generation unit when power generation unit is able to be used by power generator or when electric energy is capable of generating electricity; and    (G) adding methanol into methanol power generation unit to produce carbon dioxide, and transporting into hydrogen alcohol production unit.