The metaverse is a collection of virtual spaces and times, consisting of a series of augmented reality, virtual reality and the Internet. It represents the concept of a "transcendent universe": a virtual space that operates parallel to the real world. The concept of "metaverse" first originated in the science fiction novel Snow Crash, published in 1992, as a virtual world that runs parallel to the real world. Simply by wearing a headset and a headset device, you can enter a three-dimensional world constructed by a computer simulation through a terminal connection. Simple application scenarios that are currently visible include VR/AR+socialization/gaming/shopping/office. Become a meta-universe to meet at least 8 key features: identity, friends, immersion, anytime, anywhere, diversity, low latency, economic system, civilization. Metaverse started with the concepts of "Metaverse" and "Avatar" mentioned in the foreign sci-fi work "Snow Crash" in 1992. People can have their own virtual avatars in it, and this virtual world is called "Metaverse". Meta-universe is not a technology per se, but an idea and concept, which needs to integrate different new technologies, such as 5G, 6G, artificial intelligence, big data, etc., and emphasizes the fusion of reality and virtual reality. The meta-universe mainly has the following core technologies: first, extended reality technology, including VR and AR; second, digital twin, which is able to mirror the real world into the virtual world; and third, blockchain is used to build an economic system.