Although sport science which take objectivity as the highest rule dominate the field of sport research in the modern time, it is still impossible to remove the influence of subjectivity during the process of learning sport techniques. In fact, different understandings always occur to different learners, even if they learn from the same studies or couches. Now we have to ask: How do these understandings come to be so different? Are they all reasonable and acceptable? The purpose of this study is to analysis the process of understanding and learning of sport techniques. The result shows that to learn sport technique is not to remove the subjectivity of the learner and copy the technique objectively. On the contrary, it is a game between the object and the subject, in which the learner fuses with the technique gradually and finally reach agreement. Therefore, the subjectivity of the learner becomes necessary while understanding, and different understandings of the same sport technique also become reasonable and necessary.