摘要:Convenient transportation and the large flow of residents in the city give rise to the wide spread of COVID-19. Data collection plays a crucial role in determining the effectiveness of the control of the pandemic. The pandemic is not only a serious problem in large cities, but also hitting medium-sized cities. Macau is a typical medium-sized city where the pandemic has been under effective control with comprehensive data collection. This thesis will conduct in-depth research on the collection and application of the statistics about COVID-19 in Macau. Macau collects data through the border, incorporating NAT (nucleic acid testing) data and health codes into daily-used mobile applications, which features a network with real-time updates and sharing. This thesis will connect to the construction of smart cities to provide ideas for handling large-scale public health issues in medium-sized cities.