Nowadays, researching and innovating teaching processes is vital for teachers at higher education to improve their teaching quality, especially in applied linguistics and language education. experimental research is a useful approach for researchers, educators, teachers and managers at universities. The chapter may aim to achieve the following objectives: (1) Present a comprehensive overview of experimental research methodologies; (2) Provide guidelines for designing experiments, including defining research questions, selecting appropriate variables, and establishing control conditions; (3) Discuss various data collection methods, including observation, surveys, and laboratory experiments; (4) Detail the importance of random assignment and statistical analysis techniques to ensure robust results; (5) Highlight ethical considerations and potential limitations in experimental research; (6) Showcase examples of successful experimental studies in different disciplines to provide practical insights.