The theory of organizational inertia will be set up when the organization undergoes a change in the environment. The behavior model of organization used to strongly influence the behavior of organization results in the pressure of inertia which makes the organization unchangeable. In the purview of educational organization, the study of organizational inertia is a new range, which brooks no delay under the rapaid change of educational environment. The organizational inertia is approximately divided into four directions through exploring the document by Cheng Jen-wei and Chen Chia-sheng, in 1999. Through the strength of four directions, their study develops characteristics of organizational inertia. However, their study has no organizational inertia of school is limited because their focus is to explore the business. Current theoretical deficiency of organizational inertia are merely the exploration about relations between business and environment and relations between business and business. They fail to explore each level of organizational behavior such as every crew's behavior inertia. According to characteristics of organizational inertia by Cheng Jen-wei and Chen Chia-sheng, the study develops a gestionaire applying to the organizational inertia of school and help people to comprehend recent organizational inertia when educational reformation proceeds. The study shows that teachers of high and elementary schools in Tainan City are aware of higher effect of school and of decreasing organizational inertia of school.. Background variables such as the term of a principal and how many years the school is established is obviously different from organizational effect of school. The difference will also exist when other variables by the control of regression analysis. The term of a principal and time of a school's establishment are important variables for effect of school. This is why organization of school is so unique than other business or organizations. The study shows that in comparison to the term in 4 years, the effect of school is getting higher and the organizational inertia is getting down when the term of a principal is in 5 to 8 years. As for organizational inertia and effect of school, the organizational inertia is increasing when the effect of school is getting down. Compared to three amount lists such as management inertia of school, self-defence of school, communication of organization and circuits, the cultural inertia of organization can have access to explain the effect of school. The study shows that through the organizational cultural inertia of school teachers' perception for the effect of school will be mainly influenced by the term of a principal and how many years of a school is established. The cultural inertia of school including two variables such as the term of a principal and time of a school's establishment is the intermediate variable for the effect of school. The study mainly shows that the effect of school is getting more and more higher when a principal's term is over 4 to 8 years. If the term is in 4 years, the organizational cultural inertia will become important reference for the term system of principal.