With the development of mobile communication technology and the popularization of mobile devices, the connection between people has become increasingly close, the data circulating between them have increased rapidly, and the multidimensional space-time characteristics have gradually entered the stage of the times. The proposal of the basic smart city system is a revolution in the concept of urban construction. A smart city is both an opportunity and a challenge for the urbanization process. By analyzing the multidimensional spatiotemporal feature engineering, this paper studies the development trend of smart cities and discusses how multidimensional spatiotemporal features play a fundamental role in the smart city system.