Vocabulary is one of the language components that have an important role in learning English and should be mastered by the learners. Generally, when the students learn English, they must know vocabulary first. One of the solutions to mastered vocabulary is using word wall media. Word wall is effective medium and right medium applying for students because word wall media stuck some vocabularies based on alphabetical on the word wall with colorful words displayed in large letters. This study is aimed at two main purposes: (1) identifying how the teacher use word wall media in teaching of vocabulary at SMPN 30 BATAM, and (2) identifying the students’ perception about the use of word wall media in the teaching of vocabulary at SMPN 30 BATAM. This study uses phenomenological research. Phenomenological research is one of the types of qualitative research. In this research conducted the observation, interview, and documentation to get of the data. Interview was used semi-structured interviews with the seventh grade at SMPN 30 BATAM. Data interview was done to select from 5 students of 20 students in VII 2 class as the criteria to be included in the analysis. The function of the interview in this study is to check the data and ensure that the data is truly valid. The results of the study indicated that are word wall media is the right medium in mastering vocabulary in teaching vocabulary based on the steps taken by the teacher ix and also the most students of seventh grade had positive responds about using word wall in the teaching of vocabulary at SMPN 30 BATAM. It can be seen based on the word wall wrote down with large letters on the color of a piece paper, it is very interesting and make easy to memorize some difficult vocabularies; and vocabulary mastery can develop by looking for synonym and antonym of that vocabulary; and also the students’ perceptions that word wall media can make the student more easily to understand some vocabularies, word wall media can make them easier and faster to memorize the vocabulary, the students do not fell difficulties of using the word wall media in mastering vocabulary, word wall media can add mastering students’ vocabulary and they feel very happy, fun, enjoy, do not bored because word wall media with colorful writing pasted on the wall.