This book constitutes the proceedings of the 11th International Conference, WAIM 2010 which was held in Jiuzhaigou, China, during July 15-17, 2010. The 58 full papers presented together with 11 short papers were carefully reviewed and selected from 205 submissions. The topics covered are web data, networked data, social networks, cloud computing, data mining, stream processing, graph processing, query processing, potpourri, XML and images, new hardware, similarity search, information extraction, knowledge discovery, information integration and extending databases.