Hydrogen supply system

A hydrogen supply system supplying hydrogen, the hydrogen supply system comprising:

• a dehydrogenation reaction unit acquiring a hydrogen-containing gas by performing a dehydrogenation reaction of a raw material containing a hydride;
• a hydrogen supply unit supplying hydrogen to the dehydrogenation reaction unit;
• and
• a control unit controlling the hydrogen supply system,
• wherein, in a case in which generation of the hydrogen-containing gas in the dehydrogenation reaction unit stops, the control unit causes the hydrogen supply unit to supply hydrogen to the dehydrogenation reaction unit, and
• wherein the hydrogen supply unit supplies at least one of the hydrogen-containing gas between the dehydrogenation reaction unit and a vapor-liquid separating unit separating a dehydrogenation product from the hydrogen-containing gas and the hydrogen-containing gas separated by the vapor-liquid separating unit separating a dehydrogenation product from the hydrogen-containing gas to the dehydrogenation reaction unit.