Electric generating system of fuel cell

A fuel cell generation system is provided to improve an electric efficiency thereof, simplify the total constitution of apparatuses, and achieve power reduction of auxiliary equipment. A fuel cell generation system(70) includes: a fuel cell stack(50) formed by laminating many cells and pairs of separators alternately, wherein the cell comprises an electrolyte and a pair of electrodes consisting of an anode and a cathode having the electrolyte interposed therebetween, and the pair of separators have gas channels that supply/discharge hydrogen-containing fuel gas to the anode and oxygen-containing oxidant gas to the cathode; a fuel reformer(24) which produces fuel gas supplied to a fuel cell main body from raw material gas; a pure water system(22) which supplies pure water to a first steam generator(31) and achieves effective use of heat exhaust at the same time, wherein the first steam generator supplies the necessary steam to cause a reforming reaction in the fuel reformer; heat transfer media(60) which have thermal conductivity and mesh with all or some of the cells laminated in the fuel cell stack; and a second steam generator(51) which is disposed adjacent to the fuel cell stack so as to be thermally connected with the heat transfer media, and generates steam with heat supplied through the heat transfer media.