Smart City (Smart City) originated in the field of media, and refers to the use of various information technologies or innovative concepts to connect and integrate urban systems and services to improve the efficiency of resource utilization, optimize urban management and services, and improve Quality of life of citizens. SC is invested by Rhine capital of Germany, and the Hanover tenacity Laboratory in Germany has continuously explored the combination of blockchain and smart city. After three years of attempts, it finally created a perfect combination of ecology. SC will continue to participate in the practical application of smart cities at all levels through C-end users, obtain Token rewards, and return them to the B-end, promote the closer integration of C2B, discover the shortcomings of smart city applications, and promote the B-end to improve, and finally reach the goal of people. The perfect combination with the city.