This book constitutes the refereed proceedings of the 20th International Conference on Services Computing, SCC 2023, held in Shenzhen, China, during December 17–18, 2023.The 6 full papers in this book were carefully reviewed and selected from 18 submissions.

Research Track.- "OR" of Rule-based Specification for Service Choreograph.- Evolutionary Game Theory-Based Incentive Mechanism of Data Sharing in Financial Holdings Group.- Blockchain-driven Pet Healthcare: Integrating NFTs, IPFS, and Smart Contracts for Enhanced Pet Medical Data Management.- Blockchain Solutions to the Letter-of-Credit Problem: Leveraging NFTs, Smart Contracts, and IPFS.- Blockchain-Enhanced Pediatric Vaccine Management: A Novel Approach Integrating NFTs, IPFS, and Smart Contracts.- Research Trends in Smart Contracts in Blockchain 3.0 Phase.- Short Paper Track.- An Efficient Data Aggregation Solution for Smart Meters Based on Cloud-Edge Collaboration.