The purpose of this study is to empirically examine English teachers` behaviors of adopting multimedia. Based on the well-known technology acceptance theory, Technology Acceptance Model(TAM), this study developed a model to investigate the relationship between theoretical constructs including Teachers` Self-Efficacy, Openness, Experience, Supports, and Expectation of Learning Performance, and their impact on perceived usefulness of multimedia. A total of 228 data from teachers at middle and high schools were used to analyze the proposed model using multiple regression. The results are twofold: first, results suggest that variables in the proposed model have a significant role in regards to the perceived usefulness of teachers` multimedia, accounted for 78.6% of the variance explained in perceived usefulness. Second, results support the significant effect among TAM variables, implying that TAM is applicable in explaining English teachers` intention to use multimedia. The findings suggested that the important determinants influencing multimedia adoption should be considered for educators using multimedia in ordre to revitalize multimedia for English education.