Disclosed is a fuel cell scale up system. The fuel cell scale up system according to an embodiment of the present invention includes a plurality of unit fuel cells that generate electricity through an oxidation and reduction reaction; a common regeneration reactor that is supplied with a negative electrode solution which is reduced in the unit fuel cells for an oxidation reaction and transports the oxidized negative electrode solution to each of the unit fuel cells; and a plurality of negative electrode solution circulation pipes that are coupled with the common regeneration reactor and the unit fuel cells and circulate the negative electrode solution between the common regeneration reactor and the unit fuel cells.
