Today, information and communication technology is recognized as a key tool in organizations to achieve the goals and aspirations of the organization. Given the competitiveness of business in recent decades and the increasing role of IT in the survival and progress of organizations, they are forced to make heavy investments in this area. The large volume of this investment and the problems that have arisen in this area have created a new concern for the managers of organizations regarding the effectiveness and profitability of these investments. Assessing the maturity of information technology is an appropriate response to this concern and understanding the current situation of the organization. The purpose of the present study is to assess the level of maturity of information technology in the subsidiaries of Tavanir Company, as the custodian of the Iranian electricity industry. In this study, two power plants out of a total of 89 subsidiaries were selected as the study population. After reviewing the existing evaluation models, the Qubit maturity model was selected as the reference evaluation model in the electricity industry. Given that this model uses Aristotelian logic to connect business goals with IT goals and its processes, the current study uses the Analytic Hierarchy Process (AHP) model to more accurately identify the evaluation area. After identifying the area of ​​assessment and implementing the CUBIT model, the results indicate better performance of the selected power plant (A) and its higher maturity level. In addition, by stating the current maturity level, suggestions were made to improve the current situation.