In the construction of smart city in 2021，the new economy will promote the new development of smart city，new technologies will improve the development momentum of smart city，and the application scenarios and domestic demand of smart city will develop vigorously. In 2021，the first classified promotion of new smart city construction standards was launched，the digital twin city market developed rapidly，the construction of urban data brain accelerated，and the construction of multi city smart city made remarkable progress. The main experience of these achievements is that based on the new infrastructure，accelerate the infrastructure construction of smart cities and focus on the people；Build a digital twin city to serve daily life；Take the development of digital economy as a lever to drive the upgrading of urban industries. In 2021，new achievements were made in the innovation of smart city governance mode，and smart governance is in the builder stage as a whole. The general feature is that the digital government deeply links with the smart city，government services bloom，and the user experience continues to improve. The achievements mainly come from giving play to the role of smart community in epidemic prevention and control and promoting governance at the grass-roots level；Improve the efficiency of fine management in the construction of smart city；Closely follow people’s livelihood，epidemic prevention and control，link key points and life experience；Explore data management system and break data barriers. In 2021，the regional development of smart city is unbalanced，highlighting that the digital economy needs to be optimized and the smart environment needs to be cultivated. Therefore，the report puts forward countermeasures and suggestions for smart city construction and governance model innovation.