From technology foundation perspective, Services Computing has become the default discipline in the modern services industry. In its 23rd version, the program of ICWS 2018 will continue to feature research papers with a wide range of topics, focusing on various aspects of Web-based services. Some of the topics include Web services specifications and enhancements, Web services discovery and integration, Web services QoS (e.g., security, performance, reliability, fault tolerance, etc.), Web services standards and formalizations, Web services modeling, Web services engineering, Web services testing, Web services-based applications and solutions, Web services realizations, semantics in Web services, Web services supporting Cloud Computing, Web services lifecycle management, and all aspects of Service-Oriented Architecture (SOA) infrastructure and middleware.