NOVELTY - The hydrogen storage and supply system comprises a raw material storage unit (2), reactor (4), raw material supply unit (3), vapor-liquid separation unit (5) and a reaction material recovering unit (8). The reactor accommodates the metal supported catalyst (41). The hydrogen supply component or hydrogen storage component forms a coexisting boundary surface of a gaseous phase and a liquid phase in the reactor.    USE - Used as hydrogen storage and supply system e.g. as fuel cell system.    ADVANTAGE - The hydrogen storage and supply system supplies hydrogen stably and efficiently. The system is inexpensive and performs hydrogenation and dehydrogenation efficiently.    DETAILED DESCRIPTION - The hydrogen storage and supply system comprises the raw material storage unit (2), reactor (4), raw material supply unit (3), vapor-liquid separation unit (5) and a reaction material recovering unit (8). The hydrogen storage and supply system performs storage and/or supply of hydrogen using at least one hydrogenation reaction of the hydrogen storage component containing an aromatic compound and dehydrogenation of the hydrogen supply component containing the hydrogenated derivative of the aromatic compound. The raw material storage unit accommodates hydrogen storage components and/or hydrogen supply components. The reactor accommodates the metal supported catalyst (41) which causes hydrogenation of the hydrogen storage components and/or dehydrogenation of hydrogen supply component. The raw material supply unit supplies hydrogen supply component to the hydrogen storage component within the raw material storage unit and/or to the reactor. The vapor-liquid separation unit condenses and separates hydrogen from the formation gas from the reactor, hydrogen storage component and/or hydrogen supply component. The reaction material recovering unit collects separated hydrogen storage component and/or hydrogen supply component. The hydrogen supply component or hydrogen storage component forms a coexisting boundary surface of a gaseous phase and a liquid phase in the reactor having cylindrical form.    DESCRIPTION OF DRAWING(S) - The figure shows an explanatory drawing showing the composition of hydrogen storage and supply system. (Drawing includes non-English language text).    Raw material storage unit (2)    Raw material supply unit (3)    Reactor (4)    Vapor-liquid separation unit (5)    Reaction material recovering unit (8)    Controller (10)    Catalyst (41)