The paper presents approach that the authors have used to assess quality electronic dictionaries and encyclopedias on the basis of methodology qualimetry. Assessment methodology includes stage for determining the purpose of the evaluation, selection of the range of quality indicators, the base sample and the methods of determining the values of quality indicators for determining the values of quality indicators and assessment of scientific and technical level. The evaluation was conducted of 54 electronic dictionaries and encyclopedias, developed over the last 10—15 years by different companies.