Abstract:In order to deal with stranglehold problems in key core technologies, it is necessary to identify industry key general technologies scientifically and judge the development status of industry key general technologies accurately. The article identifies industry key general technologies by constructing LDA topic models, calculating criticality scores and commonality scores, and applying similarity analysis to determine thresholds and so on. The methods were then applied to assess the level of industry key general technologies in China, using patent data from universities and listed companies as samples. It was found that the proportion of patents belonging to key general technologies was not high for both universities and listed companies, with the proportion of patents applied for by universities and listed companies belonging to key general technologies being 14.7% and 10.2% respectively, and the proportion of granted patents belonging to key general technologies being 13.8% and 10.1% respectively, with universities accounting for a slightly higher proportion than listed companies. Further analysis of the typical key general technologies of universities and listed companies showed that the top scoring technology topics were very consistent with the current key general technologies of wide interest, indicating that the method is effective and desirable. Judging the level of industry key general technologies scientifically can provide a reference for the government to make decisions on targeted innovation support policies.