NOVELTY - The method comprises: inflowing hydrogen gas into a catalytic reactor and performing a catalytic oxidation reaction to generate gas moisture; supplying the generated moisture to a first adsorption reactor; supplying a resurgent gas absorption layer of the first adsorption reactor; controlling an adsorption reaction of the alkaline water electrolysis using a control device of a hydrogen purification unit to refine the hydrogen; performing the adsorption reaction until the hydrogen gas reaches desired purity; and increasing an inner temperature of the reactor to a pre-set temperature.    USE - The method is useful for controlling hydrogen purification in an alkaline water electrolysis (claimed).    ADVANTAGE - The method is capable of improving the yield of the hydrogen refinement process, and removing the catalyst-reacted moisture, so that purity of the hydrogen is improved.    DETAILED DESCRIPTION - The method comprises: inflowing hydrogen gas into a catalytic reactor and performing a catalytic oxidation reaction to generate gas moisture; supplying the generated moisture to a first adsorption reactor; supplying a resurgent gas absorption layer of the first adsorption reactor; controlling an adsorption reaction of the alkaline water electrolysis using a control device of a hydrogen purification unit to refine the hydrogen; and performing the adsorption reaction until the hydrogen gas reaches desired purity. The method further comprises increasing an inner temperature of the reactor to a pre-set temperature. A first three way valve controls a fluid path between the first adsorption reactor and a resurgent gas supply tube during the adsorption reaction of a second adsorption reactor. A second three way valve controls a fluid path between the second adsorption reactor and a resurgent gas exhaust pipe. A three way valve controls a fluid path between the second adsorption reactor and the resurgent gas supply tube during the adsorption reaction of the first adsorption reactor.