The current hydrogen storage technologies (i.e., compressed hydrogen gas and cryogenic liquid hydrogen) have shortcomings in terms of safety, cost, and energy consumption. Our technology overcomes these shortcomings by inventing a solid-state Mg-based hydrogen storage alloy with a high storage weight density of ~6.0 wt％ and its carrying vessel. The key innovations of our technology are: (1) integrating powder atomization process, high-energy milling, and composite catalysts to achieve large-scale, fast production of Mg-based ZK60 hydrogen storage powders; (2) developing a lightweight, portable Al 5056 alloy cylinder that houses the ZK60 powders to facilitate the cyclic operation of hydrogen storage and release up to 500 cycles.