With emphasis on the integration of digital technologies to promote environmental, social, economic, and institutional sustainability, this book examines the critical role that ICT-driven innovation plays in advancing sustainability across urban systems. The book explores how ICT solutions are changing urban development, governance, and community empowerment through a thorough analysis of important case studies, particularly in light of Hainan's local initiatives. The book highlights the various ways that ICT can be used to address urban challenges, from improving socio-economic sustainability through e-commerce to empowering senior communities with AI-driven platforms and transforming beach management through digital transformation. The increasing importance of digital platforms in urban resilience is further highlighted by the investigation of ICT for place promotion, tourism development, and local market modernization. The enormous potential for scaling digital innovation in cities is examined critically, along with issues like governance barriers, infrastructure deficiencies, and digital divides. In the end, this book offers practical advice on how to incorporate ICT into sustainable urban practices for stakeholders in the industry, policymakers, and urban planners. It ends with a roadmap for a sustainable, digitally empowered urban future, emphasizing cross-sectoral collaborations and long-term digital inclusion.