Edge clouds are becoming an important computing infrastructure for collecting and processing big data as low-latency and reliable communication technologies such as 5G, and Web of Things (WoT) are developed and deployed. Edge clouds are especially useful for efficient and secure data collection and processing for smart cities and smart factories. In edge cloud environments, it is essential to provide web services by efficiently collecting and processing various types of big data in real-time. In addition, it is necessary to develop a framework for building big data service applications in a reliable and usable manner. This workshop aims to provide a venue in which scholars and practitioners can share their experiences and present on-going work on providing value-added web services for users by utilizing big data in edge cloud environments.