This paper provides an extensive systematic review of IoT and edge computing technology for monitoring, controlling, and integrating renewable energy systems in smart cities. rowing challenges of energy consumption and the depletion of energy resources, particularly in the context of smart buildings. We. Smart buildings are increasingly using Internet of Things (IoT)-based wireless sensing systems to reduce their energy consumption and environmental impact. According to recent surveys, it is predicted that by 2030, more than 60% of the human population will live in urban areas.