Various topics related to Web 3.0, including its infrastructure, development facilities, scenario applications, technology stacks, and industry applications such as decentralized applications (DApps) and Software-as-a-Service (SaaS) platforms are presented in the book. It delves into the ecosystem of Web 3.0, discussing decentralized autonomous organizations (DAOs), open finance (DeFi), crypurrencies, token economy, digital identity, creator economy, attention economy, and cyber-physical and human systems. Additionally, it addresses governance issues, security challenges, development challenges, and legal and regulatory aspects associated with Web 3.0. Overall, provides readers with a comprehensive understanding of Web 3.0, its potential implications, and the opportunities for new industry models and business opportunities in the evolving Internet era.