This book constitutes the refereed proceedings of the 8th International Conference on Internet on Things, ICIOT 2023, held as part of SCF 2023, in Shenzhen, China, during December 17–18, 2023.The 8 full papers presented in this volume were carefully reviewed and selected from 28 submissions.

A Survey on Security in Data Transmission in IoT: Layered Architecture.- A Location Recommendation Model Based on User Behavior and Sequence Influence.- GPChain: Optimizing Cross-Shard Transactions and Load Imbalance in Sharded Blockchain Networks.- Distributed Photovoltaic Power Generation Prediction Based on Feature Extraction and Multi-Model Fusion.- A Pioneering Approach to Data Integration at Shanghai Exchange Group.- Secure Data Provenance and Semantic Interoperability Model for Big-Data In IoT: A Healthcare Perspective.- DigitalPlantMan: A Multi Process Manufacturing Task Management System for Digital Plant.- Multi-Agent DSS for Smart Government Crisis Management.