This paper analyzed the effect of a smartphone application in Taekwondo Academy. The iPhone app was self-developed to display Taekwondo education contents for Poomsae training. From the viewpoint of education, reregistration and recommendation effect, it showed statistically significant difference in 196 trainee sample survey. Therefore, the research suggest that the use of smartphone technology in Poomsae education would be a great help to the trainee for the acquisition of Taekwondo knowledge and make a great contribution to the growth of Taekwondo.