This book constitutes the proceedings of the International Conference on Cognitive Computing, ICCC 2021, held as part of SCF 2021 in December 2021. The conference was held virtually due to the COVID-19 pandemic.The 5 full and 3 short papers presented in this volume were carefully reviewed and selected from 31 submissions. The papers cover all aspects of Sensing Intelligence (SIJ as a Service (SlaaS). Cognitive Computing is a sensing-driven computing (SDC) scheme that explores and integrates intelligence from all types of senses in various scenarios and solution contexts.