The benefits of 6G technology with smart city systems are making city ecosystems sustainable, efficient, and responsive in terms of connectivity, data speed, and reduced latency. Some of the characteristics of sixth-generation wireless networks are higher frequency bands, larger bandwidth, and support a large number of devices, which makes it a key technology for IoT incities. Further, intelligent building automation systems and telemedicine systems as a part of smart solutions improve the quality and standard of life in the urban environment. Machine learning and artificial intelligence add to the elements from emerging technologies to enrich 6G-IoT in terms of analysis and decision making . Blockchain guarantees security and openness in exchanges of data, which is very important in smart city systems. Edge computing improves the processing of raw data on a real-time basis, hence minimizing the delay and transmission ofdata. In the education and training system, especially in the application of augmented reality (AR) and virtual reality (VR), enhancement by the 6G technology plays a crucial role in the city. However, there are still some open research issues to explore, including spectrumsharing, interconnection and compatibility and privacy issues. Further research should be aimed at working on standardization issues, security requirements, and possible options for the use of 6G infrastructure in the context of sustainable energy.