This chapter delves into the fundamental objectives of AI cityAI city construction, with the aim of addressing human needs across multiple dimensions, including instinctual requirements, urban problem-solving, and the realization of future aspirations. AI technology fosters social interaction and innovation by strengthening social connections and propelling economic and social progress. Meanwhile, intelligent systems offer personalized services and efficient solutions to urban challenges such as aging populations, traffic congestion, and environmental concerns. AI cities not only address current realities but also embody futuristic visions, such as underwater, aerial, and space cities. Furthermore, in response to the evolving socio-economic structure in China, diverse human needs have emerged. The application of AI technology in transportation, healthcare, urban management, and other sectors has not only enhanced urban efficiency but has also improved the quality of life for citizens. The development of AI cities is centered on people, striving to create a safe, convenient, and livable environment that meets the personalized needs of citizens—from basic living requirements to cultural innovation activities—thereby promoting the sustainable development of cities.