One of the most effective ways to support the development of public speaking skills for ELF learner is DEBATING. Debating is the consideration the world around us by thinking about different arguments, engaging with opposing views and speaking strategies. Debating helps learners improve their skills. The debate makes it easier for students to reason in structure, to analyze persuasive, and to express their thoughts in a logical way. This is an effective way to improve communication skills, thinking of foreign language students and especially students of the English language. We apply this approach to the study and testing of language students in Kien Giang University. Research results show that students have more positive attitude, actively learn information and, better speaking skills. Debating is an effective way to improve speaking skills for EFL learner.