The purpose of this research was to examine how Korean college students’ motivation toward English learning has been changed over time as they took technology-utilizing classes. In order to accomplish this, two research questions were proposed; First, how has the students’ motivation changed over the whole school year? Second, how has the students’ motivation changed in terms of their English proficiency levels? Sixty college students were required to take a simulated TOEIC test for their English proficiency levels, and to respond to the ARCS questionnaire developed by Keller (2008a, 2008b) to measure their motivation levels. An independent samples t-test was employed to compare the statistical means from the samples, specifically to find out the relation of students’ motivation and t he e ffect o f t echnology-utilizing c lasses. The r esults o f d ata analysis found out that the longer the treatment period of technology-utilizing instruction, the greater the effect on the learner’s motivation; second, the technology-utilizing instruction has a significant effect on the students’ motivation regardless of their proficiency levels, but it turns out to be more effective in improving the upper group students’ motivation toward learning. Based on these findings, practical implications for the implementing technology-utilizing instruction in the EFL classroom were suggested.