A 6-axis motion base is a equipment which controls the posture of its motion stand in real time with six degrees of freedom by continuous expansion and contraction of six electric cylinders. It is mainly used for a simulator, test equipment and product development. JRC has developed a new product which utilizes the global standard EtherCAT, an industrial high-speed network which is based on the Ethernet, unlike our conventional product that had adopted serial communication for exclusive use and contact control. Adoption of this EtherCAT interface realized the miniaturization of the housing by the wiring-saving and cost reduction. Moreover, it is also possible to add or extend the slave option equipment of EtherCAT easily for many proposes.