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Earth-moving machines were always used in the harshest environments, which can decrease operator comfort. The operator seat can reduce the effect of shock and vibration on the operator and provide him with stable support so that he can control the machine effectively. Based on the laboratory evaluation standard and test methods, a set of electro-hydraulic servo operator seat vibration test device and its control system were developed independently in this paper. The system configures WinTest10 all-digital hydraulic servo controller with software system. The software consists of two main parts: Winquick vibration control software and Ranvib random vibration signal processing software. Through the seat vibration test, the seat effective amplitude transmission rate (SEAT) factor and the transmissibility at resonance were obtained. The results provide the basis for the seat vibration-laboratory evaluation. The research indicates that the system is of great significance for the evaluation of operator seat vibration and seat optimization development.