There is much advancement in steering control technology with time. Steering-By-Wire (SBW) system is the most modern and efficient technique. This paper first introduces current status and history of SBW system from concept proposal, prototype design and development of concept car with SBW system. The structure, principle, key components and classification of SBW system are also described systematically. Then several features of SBW system are analyzed in detail in connection with efficient handling, stability, spatial structure, intelligence and security of vehicle. Finally the future issues to be researched are discussed, including system reliability, hardware technology, system control strategy and power supply.