With the rapid growth of wireless techniques, the mobile learning by the handheld devices has been gradually considered as a novel learning form. Developing context-aware ubiquitous learning environment can bring the most desired learning services for learners. Accordingly, this study proposed a personalized context-aware ubiquitous English vocabulary learning system which can exploit appropriate context based on learner?s location, leisure learning time, and individual abilities to adapt learning contents toward learners for promoting the learning interests and performance.