Organized by Tianjin University of Commerce & Tianjin University, the 2021 International Conference on Signal Processing and Communication Technology（SPCT 2021）is to be held in December 24-26, 2021 on Tianjin, China. SPCT 2021 takes “bringing together global wisdom in scientific innovation to promote high-quality development” as the theme and focuses on cutting-edge research fields including Signal Processing and Communication Technology and Big Data. This conference aims to boost development of the Greater Bay Area, expand channels of international academic exchange in science and technology, build a sharing platform of academic resources, promote scientific innovation on the global scale, improve academic cooperation between China and the outside world. It also aims to encourage exchange of information on research frontiers in different fields, connect the most advanced academic resources in China and abroad, turn research results into industrial solutions, bring together talents, technologies and capital to boost development.