This paper investigates a wise electronic differential system (WEDS) for power decentralized electric vehicles. A new strategy on WEDS, which enhances the steering stability, has been proposed. This paper presents the system analysis, modeling, and simulation of the presented WEDS on a four-wheel drive electric vehicle, which is quipped by four independent in-wheel motors on the four propulsion wheels. A novel design of electronic differential system is devised based on the fuzzy logic control. From the simulation results, this paper shows that the algorithm can achieve a better fuel efficiency than the conventional gears, which supports a more flexible and effective steering experience. Additionally, the simulation results also reveal different fuel economy for under-steer, over-steer, and neutral-steer, respectively. All evaluations confirm vehicles that use WEDS will not emerge any slips at any speeds and achieve energy-saving by the proposed framework.