ICCC is initiated in 2015. It is organized by Sichuan Institute of Electronics, sponsored by IEEE. As annual conference, it will be held in Chengdu every year, where more than 500 attendees from 12 countries all around the world have taken part. 2021 IEEE 7th International Conference on Computer and Communications (ICCC) will be held in Chengdu, China once again on December 10-13, 2021. On behalf of the Organizing Committee, we warmly invite you, Computer and Communications scientist, engineer or technician, graduate student, or simply interested by the technique, to take part in this unique and innovative conference with your enthusiasm to develop, your desire to apply and your willingness to mature the Computer and Communications technique and their applications.