The invention discloses a hydrogen reclaiming device and a system. The hydrogen reclaiming device comprises a condenser, a gas collector, a primary water seal and a secondary water seal; and the condenser is provided with an air inlet and an air outlet, the air inlet of the condenser is used for introducing the reclaimed gas, the air outlet of the condenser is connected with the gas collector and the primary water seal in turn through a pipeline to form a processing passage, an air outlet of the primary water seal is connected with an air inlet of the secondary water seal through a pipeline, and the secondary water seal is provided with a hydrogen outlet. The hydrogen reclaiming device has the advantages of simple structure, low equipment investment, low running cost and little occupied area, can reduce corresponding equipment on the premise of ensuring the quality of the hydrogen, and conveniently use dust removal, oxygen removal, water removal and purification devices, Roots blower and the like in the prior hydrogen running system to achieve the effect of effective utilization of the reclaimed hydrogen.