Considering the vehemence and speed of Taekwondo match, there always exist the possibilities of dispute against referee&＃39;s eye judgment, which will eventually damage the stature of Taekwondo. The introduction of Electronic Protector to the competition, initiated by World Taekwondo Federation, will make Taekwondo reborn as fairer and clearer sport. We will call the Electronic Protector as EIDSS which stands for Electronic Impact Detection and Scoring System. ) Fundamental principles are not complex. However 22 years of research and development definitely let us know that this zero rate defective operation needs accumulative technical know-how that cannot be imitated.