The 9th International Conference on Computer Science and its Applications (CSA 2017) will be held on Dec. 18 - 20, 2017, Taichung, Taiwan. CSA 2017 will be the most comprehensive conference focused on the various aspects of advances in computer science and its applications. CSA 2017 will provide an opportunity for academic and industry professionals to discuss the latest issues and progress in the area of CSA. In addition, the conference will publish high quality papers which are closely related to the various theories and practical applications in CSA. Furthermore, we expect that the conference and its publications will be a trigger for further related research and technology improvements in this important subject.