Professional development is seen as a way to maintain and enhance the quality of teachers. The acquired knowledge does not only bring about improvement in the teaching process, but also leads to career growth. This article discusses the concept of professional development in the field of language teaching which is distinctive from other fields. The emphasis here is on what are various methods of development they can use to improve themselves continually. Also, there are a lot of contents in the context of language teaching they require for classroom practice. Although language teachers are to gain new theories and practices, they sometimes encounter some problems in their professional development. These problems can be solved by school administrators and teachers themselves.