In 2018, there was a report about the first person who lives with the trial of the mind-controlled prosthetic arm developed by the Johns Hopkins Applied Physics Laboratory. It is a mechanical arm that can control movement through thought which will respond to various controls. This prosthetic arm is attached to a surgically implanted metal piece into the user’s humerus. Its responsiveness is close to the true-to-life human arm; however, there are also disadvantages in that the operator of the prosthetic arm must not come into contact with water and must not drive. Technology nowadays can take prostheses far beyond what we can imagine. Although they are still in the experimental stage, we hope to see more of these devices to help all people with disabilities return to life functioning correctly and live happily.