With the rapid development of on-line translation (OT), it is important to explore how we could integrate OT into EFL teaching. This article reports to what extent students were familiar with OT based on the questionnaire survey at a Japanese public university. The results show that, among the respondents, a majority of them make use of OT for translation, though not so often; They use Google Translate most which they found it on the internet by chance and also because it is free of charge; They mainly use OT for the purpose of dealing with school-related work in which they look up words or sentences, and thought it was useful. The findings were mainly discussed from the viewpoint of how students could become more informed of and more familiar with OT. Then, it was suggested that English teachers should consider using OT in the appropriate teaching context.