Electric power steering system (EPS) uses an electric motor to provide essential control to the driver. The EPS system uses variable assist, that provides more assistance as the speed of a vehicle decreases, on the contrary, it provides less assistance. This paper introduces the basic composition of the electric power steering system, and the correction methods of controller, given the main technology index of the controller. According to the performance requirements of cars steering system, make the relevant control strategy of the electric power steering system and through the design of related software and hardware to realize this control strategy and it can control each link of the automobile steering process. In this paper, a multi-agent system method was introduced to deal with the control problem of EPS system. The multi-agent system control strategy shows the advanced nature, superiority and feasibility of the theoretical analysis and engineering application of EPS control system.