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Implementing a new energy-saving electrochemical synthesis system with high commercial value is a strategy of the sustainable development for upgrading the bulk chemicals preparation technology in the future. Here, we report a multiple redox-mediated linear paired electrolysis system, combining the hydrogen peroxide mediated cathode process with the I2 mediated anode process, and realize the conversion of furfural to furoic acid in both side of the divided flow cell simultaneously. By reasonably controlling the cathode potential, the undesired water splitting reaction and furfural reduction side reactions are avoided. Under the galvanostatic electrolysis, the two-mediated electrode processes have good compatibility, which reduce the energy consumption by about 22% while improving the electronic efficiency by about 125%. This system provides a green electrochemical synthesis route with commercial prospects.