The IEEE International Conference on Web Services (ICWS) has been a prime international forum for both researchers and industry practitioners to exchange the latest fundamental advances in the state of the art and practice of Web-based services, identify emerging research topics, and define the future of Web-based services. All topics regarding Web-based services lifecycle study and management align with the theme of ICWS. In 2013, we will celebrate our 20th version of gathering, to strive to advance the largest international professional forum on Web-based services.