To diagnose and treatment a musculokeletal disorders, actually using methods required high cost or large space. This research constitute measurement and analysis range of motion on coronal, transverse, sagittal plane in realtime, using two inertial measurement unit(IMU) to calculate different values between two axis. This system expected to diagnose of musculokeletal disorders effectively in low cost and small space. As a result, it can be helpful to diagnose of musculoskeletal disorders by range of motion and develop of customized rehabilitation program.