The problem and the aim. Modern linguodidactics pays special attention to identifying the role of vocabulary in learning a foreign language, determining strategies for learning foreign language vocabulary, finding methods for testing vocabulary, mastering the vocabulary of scientific discourse, using mnemonics in memorizing lexical norms. New training formats necessitate the use of information visualization technologies and digital means in the study of a foreign language. The purpose of the study is to identify and confirm effectiveness of using digital services of infographics in mnemonics to improve the quality of teaching foreign language vocabulary. Research methods. Digital tools for data visualization are used in the system of mnemonic operations (grouping, classification, structuring, systematization, analogy, association, repetition) and methods (rhyme, association, mnemonics, chain method, memory cards, mnemonic cards). Infographic services support semantisation of lexical material and its activation, explanation of rules, situational illustration, and foreign language communication. A special test is developed, it includes questions on English vocabulary and assignments based on the methodology of A.R. Luria. Auxiliary visualization methods are used: data design in the form of mind maps, tables, charts, graphs. The experiment involved 30 students of the training program Pedagogical education (Bachelor's programme) of Vyatka State University. WordArt is used as a digital service of infographics. Statistical processing of the results is performed using the nonparametric method - Wilcoxon's T-test. Results. Students learn digital infographic services, use them to study new lexical material, memorize and present concepts/terms, set expressions, and combine familiar lexical elements in a variety of contexts. Statistical assessment of the reliability of positive dynamics of students' skills to recognize words, understand lexical units, to construct new phrases was carried out Temp <Tcrit0.05 (45<107). In conclusion rules and conditions, implementation of which ensures effectiveness of using digital services of infographics in mnemonics to improve quality of teaching a foreign language, are summarized.