The utility model relates to a ultrasonic non -destructive evaluation field, concretely relates to nuclear power station pressure vessel automated inspection equipment control system, the problem that electrical construction is complicated, the cable system is huge, the reliability is poor among the current pressure vessel ultrasonic testing control system is solved to the purpose. Its characterized in that, it includes the analytic subsystem of human -computer interaction subsystem, optical fiber communication subsystem, encoding transmission, ultrasonic testing subsystem, power management subsystem, air supply, optical fiber communication acquisition subsystem, motion control subsystem, air -operated controller subsystem, encoding transmission acquisition subsystem and power under water. The utility model discloses only need arrange the power between remote operation end and the mechanical carrier among the control system, optical cable and trachea, system's cable overall arrangement is succinct, the resource of using manpower sparingly greatly, the motion control subsystem adopts distributed architecture, cascades through etherCAT industrial bus between main website and the slave station, and the real -time is good, greatly the simplified system control structure.