This device primarily comprises a dosage system, electrolytic cell, power supply, electrolyte circulation system, and hydrogen storage system. It is a process that utilizes electrical energy to decompose water into hydrogen and oxygen, with the produced gas being pressurized and stored. It supports quantitative feeding of electrolytes in different proportions, quantitative replenishment of raw materials, and adopts an integrated design concept overall to achieve interlocked control of hydrogen production and storage.