HYDROGEN RELEASE/STORAGE SYSTEM, HYDROGEN RELEASE/STORAGE METHOD, AMMONIA PRODUCTION EQUIPMENT, GAS TURBINE, FUEL CELL, AND STEEL MILL

A hydrogen release and storage system () of the present invention includes a first hydrogen release and storage unit (A) composed of a first hydrogen compound member (A), a first container (A) that accommodates the first hydrogen compound member (A), a first heating apparatus (A) configured to heat an inside of the first container (A), a first cooling apparatus (A) configured to cool the inside of the first container (A), a first water supply apparatus (A) configured to supply water to the first container (A), a second hydrogen release and storage unit (B) composed of a second hydrogen compound member (B), a second container (B) that accommodates the second hydrogen compound member (B), a second heating apparatus (B) configured to heat an inside of the second container (B), a second cooling apparatus (B) configured to cool the inside of the second container (B) and a second water supply apparatus (B) configured to supply water to the second container (B).