Abstract: To sort out the key characteristics of the emergence and development of metauniverse, point out the commonalities between meta-universe and urban design: derived from vision, based on reality and collaborative creation; further summarize the three dimensions of meta-universe enabling urban design: space expansion, time continuity and people build. According to the needs of urban construction and operation and the development of urban design work, the method of combining "R (reality)" with "AR (augmented realty)" —— "RAR (reality auqmented reality)" is proposed, and the urban design process and results of meta-universe enabled by "RAR" method are collectively called "city yuan-universe". The typical practice of "urban universe" is summarized, the creation process is classified and refined, the general flow chart of creation and operation is structured, and the technical path of applying "RAR" method to realize urban universe enabling urban design is detailed, in order to provide guidance for the future development of urban design under the background of stock.