The 5th International Conference on Communications and Future Internet (ICCFI 2021) will be held in Singapore during July 16-18, 2021. ICCFI 2021 serves as an annual platform to bring together researchers and practitioners from around the world who are developing or involving in Communications and Future Internet fields with attendant economic, environmental, and societal benefits. It enables the sharing and exchange of innovative technologies and approaches being applied in related fields of Communications and Future Internet.