Other than classroom work, recommending learning resource in the extra-curricular activities is also an important factor to improve students' disciplinary study environment. And the learning resource, such as extra-curricular book, supporting video and other learning materials, recommending in extra-curricular activities requires the matching of the requirements of the student and the disciplinary of the resource. Taking the disciplinary book as an example, this paper firstly analyzes the problem of disciplinary-requirement mismatch between the student and the disciplinary book in extra-curricular activities, and describes the student's requirement for disciplinary book recommendation system. Based on requirement investigation, the specific demands for book recommendation system based on android are analyzed. Finally, the disciplinary book recommendation system based on android for disciplinary study in extra-curricular activities is designed.