In the era of information technology, foreign language teachers should not only master the professional knowledge of foreign languages, but also master the theoretical knowledge and application skills of modern education technology, that is, have certain information literacy. This article studies the strategies to improve the information literacy of foreign language teachers in colleges and universities under the background of artificial intelligence, constructs the evaluation index system of foreign language teachers' information literacy using the analytic hierarchy process (AHP), and establishes a fuzzy evaluation model of foreign language teachers' information literacy based on the index system. The results show that foreign language teachers' information literacy level is above the middle level. The information literacy of teachers with different professional titles and ages is not consistent in the four dimensions of information awareness, information knowledge, information ability and information ethics.