Abstract: ［Purpose/Significance］This paper aims to summarize the evolution trajectory of disciplinary knowledge in the field of library and information science, as well as track and predict the research hotspots and growing points.［Design/Methodology］Based upon the data of core journals in the field of library and information science taken from WOS and CSSCI,the popularity of scientific topics was calculated and its status was evaluated with the use of TP-JIF model.Moreover,an evolution analysis was conducted on research hotspots and disciplinary growing points.Then a practical research was done in the field of LIS through the TPP-LSTM model.［Findings/Conclusion］According to the results, there are obvious differences in the amounts and focuses of research hotspots between China and other countries.Research hotspots of foreign countries mainly lie in social media,electronic health record,knowledge management,bibliometrics, machine learning, Altmetrics and so on, while the research hotspots obtained from the data of CSSCI are library science, big data, knowledge service, digital humanities, artificial intelligence and so on so forth. Data science appears to be the most promising growing point, while health care，artificial intelligence, scientific evaluation index and systems, digital literacy and data management tend to grow fast. ［Originality/Value］This paper reveals the differences of research hotpots and growing points in the field of library and information science between China and other countries, and makes a prediction for the research hotspots and growing points, which could provide references for future planning.

Key words: Library and information science, Scientific topic, Evolution analysis, Evolution prediction, Popularity index