From the review of many literatures, it is considered that there are still prevailing obstacles for second language learners due to insufficient vocabulary. Fortunately, there is a way to increase one's vocabulary by means of extensive reading realizing stories . The research tries to utilize robot as a medium to design a pressure-free and intriguing learning system. It is a learning method imitating TPRS that enables learners to design a personal storytelling robot. The learners proceed with extensive reading during the process of designing a storytelling robot and achieve vocabulary acquisition through designing the movements of robots corresponded to the vocabulary by themselves. Our research is in a preliminary stage of realizing users' responses. Ten learners from graduate school students of National Central University Department of Computer Science and Information Engineering, the result of tests and interviews will be the basis of further mass amount experiments and improvement.