Ensuring sustainability has become a common phenomenon globally, specially in the hospitality industry. Using innovative technological tools to implement green practices and sustainability is crucial. In this chapter, sustainable practices are related to implementing smart technological systems such as energy conservation, water conservation, and waste reduction in the hotel industry. This study investigates extensive literature on smart technologies to ensure sustainability and green practices in the hotel industry. This study focuses on key sustainable technologies such as Automated HVAC, optimized energy usage, water management, and food waste reduction. The chapter proposes a range of frameworks of the key applications for efficient energy systems, energy-efficient lighting and appliances, renewable energy sources, waste reduction technology, green building technologies, eco-friendly amenities, and water conservation techniques. It also suggests a practical strategic action plan to adopt smart technologies in the hotel industry in a green and sustainable manner.