In order to make it convenient to study motion features by motion trajectory analysis, this paper designed a motion trajectory measurement and display device, where MEMS (Micro Electronic Mechanical System) technology and visualization technology were put into use. MMA8450Q, a 3axis, lowg acceleration sensor of Freescale Semiconductor Corporation, and a computer played the core role of hardware development platform, while LabWindows/CVI 8.5, developed by National Instruments (NI) Corporation, was used in visual programming. After series of performance validation experiments, the procedure of designing, complement, debugging and experiments of the motion trajectory measurement and display device based on MEMS was accomplished.