Abstract: With the continuous advancement of networks, communication technology, sensor technology, artificial intelligence and other technologies, the field of intelligent industry is booming. As the leader of emerging technologies, digital twin technology has also become the new direction for the next generation of industrial intelligence. Based on this current situation, and with the combination of the basic concepts, technical features, application prospects, and development trends of digital twin technology, this paper analyzes and summarizes the common core concepts key technologies and application prospects of digital twin technology in different application fields, as well as the relationship between digital twin technology and other corresponding IoT technologies such as artificial intelligence, industrial big data. The prospects for the future development of industrial intelligence are illustrated through the research.