Many researches have indicated that the wireless technology can enhance the learning performance of teaching, learning and self-study. Therefore, the web-based learning has been evolved into mobile learning and even ubiquitous learning in recent years. Certainly, performing language teaching and learning actions by handheld devices in cooperating with advanced wireless technology has been a novel trend. Therefore, the research proposes a context-aware ubiquitous English learning system in a campus environment, which can detect the learner location by wireless positioning techniques, then retrieve specific learning content based on location information to individual learners through wireless networks. Currently, the system prototype has been successfully implemented on PDA and it has been applied to assist English situated learning for learning performance promotion in a campus environment.