The researcher conducted this research to investigate students' perceptions about the impact of debate techniques on speaking skills. This research aims to discover students' opinions to the use of debate techniques on speaking skills, to determine aspects of improving speaking skills, and to find out the challenges of students' speaking skills through debate techniques. This research uses quantitative methods and researcher use questionnaires to collect data. The participants in this research were 100 students of class X, XI, and XII of SMK Negeri 1 Peusangan. The results found that around 77% of students were able to develop speaking skills through the use of debate techniques. Debate techniques develop students' self-confidence, pronunciation, grammar, accent, fluency, vocabulary, and arrange arguments. However, some other students thought that the debate technique had challenges such as difficulty understanding the opposing team's arguments, struggle on making structured arguments, have challenge in giving rebuttals and feeling nervous.