Evolution Analysis of Information Retrieval based on co-word network

With the development of natural language processing and artificial intelligence, remarkable progress has been made in the field of information retrieval In this paper, we selected papers on information retrieval from web of Science in the past ten years, and constructed a Co-word network based on the co-occurrence relationship of keywords in the same paper. By analyzing the evolution of the Co-word network community, the core evolution and the number of keyword status, we discussed the evolution of research focus in the field of information retrieval in the past ten years. The results show that natural language processing, medical information retrieval, image retrieval and social media retrieval are the focus of information retrieval research in recent years.