The embedded system of motion simulation was introduced. The motion signals collected by the embedded system were transferred to the upper layer computer through wireless network and the computer controlled motion simulation device to fulfill on-line simulation of motion. The structure and characteristics of the embedded system has been illuminated, the method of the motion signals collection, and the method of communication of the embedded system and upper layer computer, and the method of application software design were all introduced. The experimental result verified that design of the embedded system of motion simulation is feasible and the running of software application is reliable.