The purpose of this study was to investigate the deviations of classroom observation in research of education and cases from physical education.The observer himself might be the factor which lead to this problem, as well as the interactions between the observer and the observed. Methods to dispose the deviations were applied, which could start from the ability of the observer, inner and outer aspects to solve the deviations of classroom observation were also operable. Possibilities to understand the observe deviations were offered, to solve this problem, then to explain it in detail, was also a way of thinking to dispose the deviation problems of classroom observation in research of education.