This study attempted to investigate the current situations of teacher's knowledge inertia, organizational learning and school effectiveness in elementary schools and to analyze the differences among teacher's knowledge inertia, organization learning and school effectiveness in personal variables. Furthermore, it tried to explore the relationships among teacher's knowledge inertia, organization learning and school effectiveness. Finally, this study try to verify these factors for prediction. The adopted study methods are literature review,and questionnaire . The subjects includ 558 teachers from public schools . The collected data are analyzed by descriptive statistic, t-test, one-way ANOVA, pearson product-moment correlation, and multiple stepwise regression analysis. According to the result of the data analysis, the main findings were as follows: 1.The teachers of elementary schools in Kaohsiung city perceive poor degree on teacher's knowledge inertia. Among the sectional scores, ¡§experience inertia¡§ is the highest. 2.The teachers of elementary schools in Kaohsiung city perceive a middle level on school¡¦s organizationa learning. Among the sectional scores, ¡§team learning ¡§ is the highest. 3.The teachers of elementary schools in Kaohsiung city perceive a middle level on school effectiveness . Among the sectional scores, ¡§teacher's teaching quality ¡§ is the highest. 4.The teachers who worked at middle-size school with an education degree of normal junior college or normal school perceive a better performance of teacher's knowledge inertia. 5.The teachers who were male, elderly,and senior can sensed school¡¦s organization learning better. 6.The teachers who were male, elderly, senior, with high educational degrees and part -time administrators can sense school effectivenss better. 7.There was weak correlation between teacher's knowledge inertia and organization learning. 8.There was weak correlation between teacher's knowledge inertia and school effectivenss. 9.The more positive function school's organization learning in school developed, the better performance of school effectiveness promoted. 10.The performance of teacher's knowledge inertia and school¡¦s organization learning can predicted the performance of school effectiveness ,especially the aspect of ¡§Knowledge Transmitting & Applying¡¨. Finally, based on those findings, the study suggested some implications for administrative authorities, elementary school principals, teachers, and further studies as well Keywords¡G knowledge inertia¡Borganization learning¡Bschool effectiveness