Learning a foreign language nowadays extremely spread in the web-based form or online learning. Web-based is one of the tools that can be count for the learners to choose for learning. A good web-based is when the developer applied a good instructional design in order to get positive impact towards learner’s performance. Hence, this study was conducted to investigate the effectiveness of the web-based to learn foreign language on recalling performance and motivation. Furthermore, it also looks deeper to the TAM (Theoretical Acceptance Model) model and Information Processing Theory that influence the design of the website and the effect of motivation towards learners. The effectiveness was determined by analyzing the results from the oral tests, questionnaire and interview. The web-based of Thai language was determined. This study was involved 20 undergraduate students who are not familiar with the Thai language for duration of four weeks.
