The invention provides a fuel cell device, which comprises a negative collector plate, a negative cooling plate, a negative flow field plate, a membrane electrode assembly, a positive flow field plate, a positive cooling plate and a positive conducting panel, which are sequentially fitted and connected with one another, wherein the membrane electrode assembly comprises an exchange membrane, a plurality of negative catalyst layers, a plurality of negative gas diffusion layers, a plurality of positive catalyst layers and a plurality of positive gas diffusion layers; the negative collector plate comprises an insulting base body and a plurality of conductive layers; each conductive layer is connected with a collector terminal through a lead; each lead between each conductive layer and each collector terminal is connected with a current sensor in series; and a plurality of parallel gas channels are arranged on the surface, close to the membrane electrode assembly, of the negative flow field plate, and the surface, close to the membrane electrode assembly, of the positive flow field plate. According to the fuel cell device provided by the invention, practical reaction performance distribution, reaction condition distribution and the like of various local regions in the cell can be monitored in real time, so that the research and development efficiency of the fuel cell is greatly improved.