The obejectives of this research are to know the improvement of the students' achievement in poetry mastery and their perception regarding to the semiotic method in teaching and learning poetry in English Education Department, Languages and Art Faculty of State University of Medan. The research method used is the Classroom Action Research (CAR). The subjects of the research are the fifth semester of 37 students of 2013/2014 academic year. The data are collected by test in order to know the students' achievment in poetry mastery. The students' perception toward the implementation of the semiotic method for teaching and learning poetry is collected by questionaire. The data are analyzed by descriptive analysis. The result of research shows that (1) the average score of the students' achievement of poetry mastery is (71.75) or it increases (11,59) point from pre-test (60.16) and (2) in general, the students' perception toward the semiotic method for teaching and learning poetry are good and positive.