The invention provides a hot-blast stove system and method for a different-speed circulating fluidized bed, belonging to the technical field of a hot-blast stove, and aiming at the problems that the existing chain stove and hot-blast stove cannot combust inferior fuel and is short in service life and the combustion efficiency of the hot-blast stove of the fluidized bed is low and the like. The system is characterized in that a coal feed port, a coal spreading air port, a secondary air inlet and a low temperature flue gas inlet are arranged in a stove body located at a middle lower section of the side wall of a hearth; the lower part of the hearth is provided with an air chamber and a low temperature flue gas chamber; the upper part of the air chamber is provided with a horizontal air distribution plate; the upper part of the low temperature flue gas chamber is provided with an inclined air distribution plate; a hearth flue gas outlet is communicated with a cyclone separating device; the cyclone separating device is communicated with the hearth through a return valve; a cyclone separating device flue gas outlet is connected with a flue; a main body heat exchanger is arranged in the flue; the flue is communicated with a dust remover; the dust remover is respectively communicated with a circulating fan and an induced draft fan; and the circulating fan is respectively communicated with the low temperature flue gas air chamber, the low temperature flue gas inlet and the flue. The hot-blast stove system provided by the invention can be used for producing hot wind by the different-speed circulating fluidized bed boiler.