Abstract: To make computers understand web information and provide personalized service quickly and accurately for users, combining the research findings of the semantic web, dynamic ontology and the Self-Consciousness of agent, the article put forward a basic idea and a overall framework of the semantic web based on self-consciousness of agent and studied the main components of the semantic web, including the semantic structure of website agent, WOW agent and client agent. The semantic structure of web is designed, which is the core part of WOW agent.