Teachers play an important role in both the traditional and modern teaching process.The role of the teacher as a topic has been discussed in the field of general education as well as the language education for many years.The main purpose of the paper is to analyze the historical roles of English teachers in three different periods and to reorient English teachers’roles in the new teaching model.With the support of the modern teaching means,English teachers can play roles as organizers,participants,prompters and supervisors in the Information Age.