The development of the computer along with the widespread use of the Internet has rapidly promoted Computer-Mediated Communication (CMC) as a very important communication media, which can be used widely and effectively in foreign language teaching and learning. This essay tries to explore the advantages of CMC as well as its proposed application, beginning with the introduction of some concepts related to CMC. From the research history, the rationale of using CMC in foreign language learning is summarised. The context of an EAP course is introduced and some suggestions on using CMC in this course are proposed.