Magnetorheological fluid dampers (MRD) represent a typical engineering application of MR fluids, primarily utilized in the field of vibration and noise reduction. In this study, the MR damper is applied to a scissor-type seat structure. An improved skyhook damping control strategy is implemented for the semi-active seat suspension control. The suspension controller and sensors were designed. Based on the angle and acceleration signals measured by the sensors, the controller calculates the required variation in suspension and damper parameters. Experimental results demonstrate that, compared to a passive seat, the proposed sensing and control system achieves a mean vibration reduction rate of approximately 28% to 32%. Vibration transmission is effectively attenuated, leading to enhanced ride comfort.