As a collaborative social tool in web2.0 ear, wiki has a great potential in supporting learners’ collaborative learning. After analyzing the present wiki research on learning activity, this paper focus on undertaking a case study of using wiki in a collaborative learning activity, proposes activity design of the wiki activity, then provides some findings on the transformation of students’ performance and teacher’s role, finally proposes conclusion of this activity and discussion about difficulties faced in present research and aspects that need to be improved in similar further activities.