The purpose of the work is to develop a method for modelling contradictions that emerge when evaluating the quality of marketing information. The work refers to the basics of Qualitology, the science of quality. The essence of the Principle of Quality Mapping and the Principle of Quality Evaluation of objects was presented, turning attention to the prob-lem of qualitative contradictions. The marketing information quality model was defined and the method for testing and assessing the quality of marketing information was adopted. A model of qualitative contradictions emerging while improving the quality of marketing information has been developed. The sequences of actions leading to the identification and arrangement of qualitative contradictions in relation to their impact on the quality of mar-keting information have been determined. Methods for solving qualitative contradictions have been indicated. While designing the above activities, Grey System Theory and Rela-tions and Regression Theory were referred to at the stage of identification and ordering of qualitative contradictions, and to Theory of Inventive Problem Solving at the stage of de-fining methods of solving the problem of quality contradictions for improving the quality of marketing information. Directions for further research and improvement of the method are indicated, for improving the management of marketing information quality.