3rd International Conference on Computer Information Science and Application Technology (CISAT 2020) will be held on July 17-19, 2020 in Dali, China. CISAT 2020 is to bring together innovative academics and industrial experts in the field of computer information science and application technology to a common forum. The primary goal of the conference is to promote research and developmental activities in computer information science and application technology and another goal is to promote scientific information interchange between researchers, developers, engineers, students, and practitioners working all around the world. The conference will be held every year to make it an ideal platform for people to share views and experiences in computer information science and application technology and related areas.