This book constitutes the refereed post-conference proceedings of the Second International Conference on Internet of Everything, IoECon 2023, which took place in Guimarães, Portugal, in September 2023. IoECon 2023 presents IoT paradigms to their whole dimension, intelligently connecting devices, people, processes, data, and things. IoE is multi-disciplinary and offers an opportunity to explore the co-relations between different areas, techniques, and theories about a new cyber world. The 11 revised full papers were carefully reviewed and selected from 38 submissions. The papers focus on a complete ecosystem that digitally interconnects everything, including people-to-people, people to-machines, and machines-to-machines.