At first this project reviews and then compares the self-efficiency of instructors and students who use the internet in the Isfahan teacher training center. The research method is descriptive-survey. The statistical population consists of all the students and instructors in Isfahan teacher training centers. The related data gathered by the researcher made questionnaire. The validity of the questionnaire was determined by content validity. The reliability coefficient calculated by Cranach’s Alpha scale 0.94. The findings showed that it should be a significant difference between the students and instructors ideas in their self-efficiency to use the internet in different areas such as: education, communication and research context. The instructors’ self-efficiency level in education, communications and research context is more than students. Also both groups have the same viewpoints about the effective factor that increase the self-efficiency in using the internet. Among these ideas access to the internet at home for the students and holding English courses for instructors has more importance.