The work aims to take memorial hall as the research object to discuss the construction of intertextual interpretation method in visual identity design and demonstrate the innovative ideas of visual identity system design method. Focusing on the development and transformation of the "intertextuality" theory in semiotics and rhetoric, literature research method and case study method were adopted to summarize and comb the theoretical extension of related disciplines and propose that the theoretical research of "intertextuality" tended to be "multiple" and "tool-type". With Chairman Mao's Memorial Hall as an example, a three-level visual identity system design method of "visual context-visual semantics-visual grammar" was built from historical texts, architecture, cultural relics and other aspects of the memorial hall. Then, graphical analysis and empirical research were adopted to carry out design analysis. Thus, the multiple intertextual paths of "contextual intertextuality-image intertextuality-structural intertextuality" were formed in the design.The thinking related to visual identity system design is deepened from the perspective of interdisciplinarity. The discussion of intertextual mechanism is not only conducive to the inheritance of innovative cultural symbols in the context of the times, but also beneficial to extending the systematic approach of visual identity system design in different media relations.