In order to improve the construction level of Yi yang smart city, by combing the previous evaluation indicators of smart city construction and the comprehensive comparison of relevant cities, five firstclass evaluation indicators, i.e. information infrastructure, unified support platform, people's livelihood service, industrial support and urban management are selected, and the principal component analysis method is used to find out the key factors affecting the construction of Yiyang smart city By improving the construction awareness of smart city, strengthening the top-level designandsystem ...