According to some unofficial researches and my own experience in the field of teaching reading skill , I have found that some students had many problems when they were being asked to read some online text especially when they were supposed to participate in an on-line reading comprehension test. So I tried to find out the reason or reasons of this problem. The first probability for this problem was that the difference between on-line and off-line environment influenced the students' performance in an on-line reading comprehension test. The second probability that I have made for this problem was that having a high level of IT literacy had any effect on the performance of students in the on-line reading comprehension test or not. And the last hypothesis for investigating the reason of this problem was that students may have employed inappropriate strategies while they were reading on-line. All these probabilities and hypotheses have led the researcher toward formulating the null hypotheses of this study. The purpose of this study is to determine the effect of on-line Reading strategies on the choice of off-line Reading strategies of Iranian Intermediate EFL Learners.