This paper explores the integration of renewable energy and smart healthcare infrastructure as pivotal components for sustainable urban development. By leveraging renewable energy sources such as solar, wind, and bioenergy, cities can reduce their carbon footprint and foster environmental sustainability. Concurrently, smart healthcare infrastructure, enabled by advanced technologies like IoT, AI, and big data analytics, promises to enhance the efficiency, accessibility, and quality of urban health services. This study reviews existing literature, identifies key trends and challenges, and proposes a comprehensive framework for the implementation of these technologies. Through case studies and empirical analysis, the paper demonstrates the potential benefits and outlines a roadmap for future research and practical applications.