The International Conference on Semantics, Knowledge and Grid (SKG) is a cross-area international forum on semantic computing, knowledge networking, and grid computing. SKG promotes cross-area research and pushes the development of relevant areas. SKG2007 will be held in Xi'an, a city with 3100 years' history. Themes (include but not limited to) Semantics and Semantic Grid. Semantic Web Semantic Search and Query Semantic Link Network Semantic Normalization Semantic Interoperability Semantic Visualization and Modeling Semantic Web Mining Semantic Brokering Semantic-based Interface Automatic Semantic Annotation Semantic Web Services Theory and Model of Semantic Grid Ontology Web2.0 Semantic P2P Rich Media Semantics Knowledge and Knowledge Grid. Web knowledge representation and Reasoning Semantic Knowledge Portals Web Knowledge Discovery Knowledge Discovery Theory and Model of Knowledge Grid Large-Scale Distributed Knowledge Management Ontology Information/ Knowledge/Service Integration Knowledge Flow Internet-based Knowledge Engineering and Software Engineering Advanced Networking Model Resource Management Model in Grid Internet-based Multi-agent Systems Nature-Inspired Computing Autonomous Computing Internet-based Intelligent Applications P2P Computing Grid Computing Self-Organized Intelligence Service-oriented Computing Mobile Grid Systems, Tools and Applications。 Semantic-based Virtual Organization e-culture e-Science e-Business e-Learning e-Government Grid Security Sensor networks and the Grid applications e-Culture or e-HASS(Humanities, Arts and Social Sciences) Applications in Humanities Applications in Arts Applications in Social Sciences