Abstract: The Metaverse can be seen as an extension of the real world, a digital virtual world born out of the real world but also parallels and interacts with it. It connects virtual and reality, enriches people's perception and experience, extends people's creativity, and brings more possibilities for the development of human society. The Metaverse is the coupling between people's imagination and real technical conditions and relies on the system integration and comprehensive application of new technologies such as human-computer interaction, artificial intelligence, blockchain, and the internet of things. In this paper, by combining and analyzing the concepts of the Metaverse and its supporting technologies, a variety of technologies are summarized and unified under a technical framework, the "BIGCHINA" technology system. It includes eight types of technologies breaking through the technology from a single technology to a certain extent, which has specific reference significance for understanding the overall development status and future trends of the current Metaverse technology.