In order to harmonize the performance of vehicle handling stability and riding comfort, an integrated controller of vehicle chassis system was designed based on embedded system after analyzing the principles of semi-active suspension(SAS) and electric power steering(EPS). Stepper motor of suspension adjustable damper and DC motor of EPS were controlled respectively by hardware. Fuzzy and PID arithmetic were applied in software. United adjustment to hardware was done with HyperTerminal under the condition of CodeWarrior integrated development. Experiment results proved the controller and motors were running reliably, handling stability and riding comfortably when integrated condition were being improved.