To improve the reliability of control system and reduce the components, a stepper motor controller is designed. The excogitation also affords corresponding hardware implementation methods and software process. The control system is with LM3S2110 as its core. The stepper motor is driven by DRV8813 and the interfacing technique between CH452 keyboard and LED driver are given. It turned out that the system can simplify the design scheme in a economical and reliable way.