What does the fact mean that Toegye had disciples practice the Touhu and performed it himself? What is the value of the play, Touhu? What did Toegye experience with Touhu? In order to solve out these problems, examining the primary textbooks, such as < Complete work of Toegye > and < Complete work of Dosa >, I described and appreciated the structure and principles of Toegye’s thought. Thereby, implications approach was adoped for the research method, that took the principles out which enables the Touhu to be explained for its distinct aspect of physical activity. The results are : 1. It has been performed since the days earlier than the unification of Silla and was approved as a mind control rather than a simple play in Chosun dynasty. 2. Toegye kinesthetically experienced unification of the body and mind while performing Touhu. Such a physical experience might also be a thought of piety, which recognize the experience of oneness. “Touhu in a Spirit” which is recorded and described in a diary of Toegye, extremely express his phenomenological experience. The philosophy of Toegye is a thought of piety. Daily living of Toegye is the one experiencing and realizing the piety. Touhu is a physical activity mastering a strict manner and a standard of human movement. Mental attention to the throwing and putting arrow into the Touhu is considered as the piety itself, which penetrate the movement-stops conceived by Toegye. 3. Touhu was a medium used for bringing up confucianistic virtue of wise, right, manner and wisdom. “Common mind and upright body”, which straighten the attitude of body and ease the mind, is completed by physical activity of Touhu. After observing the other’s virtue with common mind and upright body in order to form his own virtue, he must express the activities of common mind and upright body. These points indicate the significance of Touhu. 4. Touhu for Toegye was a physical activity for the study of piety in an emergency. When performing Touhu, one’s physical recongnition about the devotion of body and mind, attentioning the mental unified, is the piety. It is difficult when one’s mind is moving. A man’s existence can be recognized as becoming oneness of body and mind together. Through the pleasant play, Touhu, Toegye genialized the minds of himself and his disciples, and enabled them to proceed to the piety.