Because of the arrangement of Grade 1-9 Curriculum, it leads to the fact that most of curriculum are instructed in the classroom. Thus, whether the classroom environment is comfortable or not, it affects students' leaning effects and teachers' teaching quality. The purpose of this study was to explore the current status, differences and correlation of indoor environment quality and teaching quality. Questionnaire survey, on Indoor Environment Quality and Teaching Quality was developed as the research instrument. After stratified sampling, 500 teachers from elementary schools in Yunlin are selected to participate in questionnaire survey. 422 samples were effective and the effective rate of recovery was 84.4%. Data were analyzed by descriptive statistic, one-way ANOVA, Pearson product-moment correlation and multiple stepwise regression analysis. Conclusions were as follows: (1) The current condition of indoor environment quality and teachers' teaching quality is above average. (2) Indoor environment quality of the different school locations and teacher's teaching quality has revealed the difference. (3) There is a high positive correlation between indoor environment quality and teaching quality for the elementary schools. (4) There are positive correlations between four aspects of indoor environment quality and teaching quality for the elementary schools. (5) Indoor environment quality is a proper indicator in predicting teaching quality for elementary schools. Based on the results of the study, the researcher provides concrete suggestions for practice applications and future researches.