The methodology of forming the required level of quality of information systems based on fuzzy cognitive modeling is developed. The key element of the methodology is the developed integrated criterion for assessing the quality of the information system, which reflects the combined effect of different groups of indicators that meet the characteristics given in the standards of the GOST ISO 9000 series. The method has been tested in one of the leading universities in the Volga region. The software that implements the developed methodology was developed

Keywords: Information system, linguistic variable, fuzzy cognitive modeling, information system quality, reliability, information security, confidentiality, integrity, accessibility, reliability, reliability, durability, maintainability