The structure and working principles of automotive EPS system was introduced and the fault mode and corresponding control technologies were designed. The fault mode of EPS had hardware faults and software faults. For hardware faults, the methods of modular design of EPS controller, dual CPUs parallel working, complementary signals output of torque sensor, parallel working of MOS transistors, fault indicator and code display were adapted. For software faults, the method of software redundancy technology including N version procedures, resumption block technology and exceptions technology were adapted. The design of EPS fault control technologies can effectively improve the safe and reliable performance of EPS and the automotive handling safety.