The paper begins with a brief mention of various stages of communication development in the world. Then it explains in detail how the Internet stimulates the explosive growth of data communication traffic

and raises the idea of the new data centric packet based national network in the new millennium. It also describes how the application of optical fiber technology promotes the formation of large capacity broadband network and how the application of wireless mobile system promotes the realization of the global personal communication. Finally

a few remarks are made for the communication development trends in the new millennium.