In the list view. Nvivo is a software that supports qualitative research methods and mixed research methods, and can help collect, sort out and analyze interviews, focus group discussions, questionnaires, audio and so on. It is necessary to display the node reference number in the list diagram. Node graph is knowledge map, which is called knowledge domain visualization or knowledge domain mapping in library and information science. It is a series of different charts showing the relationship between knowledge development process and structure. Describe knowledge resources and their carriers with visualization technology, and excavate, analyze, construct, draw and display knowledge and its relationship.