This book constitutes the refereed proceedings of the 7th Asia-Pacific Web Conference, APWeb 2005, held in Shanghai, China in March/April 2005.The 71 revised full papers and 22 revised short papers presented together with 6 keynote papers and 22 invited demo papers were carefully reviewed and selected from 420 submissions. The papers are organized in topical sections on classification and clustering, topic and concept discovery, text search and document generation, Web search, mobile computing and P2P, XML, integration and collaboration, data mining and analysis, Web browsing and navigation, spatial data, stream data processing, Web services, ontologies, change management, personalization, performance and optimization, Web caching, data grid, multimedia, object recognition and information extraction, visualization and user interfaces, and delivery and networks.