Nowadays, the gap between traditional engineering and medicine sciences are rapidly filled. Thank to the development of technology and sciences, medical instrumentation are not only used for diagnostic but also be a part of clincal protocal. Along with that, when we combine biomechanics and biomaterials together with electronics, amputees can moving their limbs again with smaller, lighter and more convinients machine. Although there are ideas about physical medicine and rehabilitation technologies, prosthetic limbs are still not widely used due to the commercials prices. Therefore, we used solidworks to model robotics arm as a initial step to develop a product meets the basic engineering requiredments and cost-effective