Abstract
AI system in digital game consists of meta-AI,character AI,and spatial AI,and they cooperate each other. The cooperation of three AIs gives flexibility to digital game itself and produces unique user experience to users. The system makes a digital game intelligent.Smart city means a city which has its own intelligence.It is possible to make a smart city by using MCS-AI dynamic cooperative model.Meta-AI controls a whole city,character AI is implemented as AIs of robots and drones,and spatial AI analyzes space and terrain of a city and recognize a status of city.In the proceeding, a theory of smart city by using MCS-AI dynamic cooperative model is supposed.