The work is devoted to the topical issues of improving the information support for leaders of operational services when extinguishing large fires. The models are considered dealing with ranking of information control tasks for the practical implementation, taking into account the characteristics of their introduction in the structure of the fire and rescue team communication and control automated information system when extinguishing large fires. The automated system modular structure is proposed, which represents the aggregate of information modules allowing to receive real time access to the legal information control database, to form the communication structure and algorithms, as well as to interact with the fire monitoring instruments. The testing of the proposed structure showed that its information-analytical component needs to be improved through the introduction of the information control tasks ranking. Such a control tasks ranking model has been developed and a method has been proposed that implements it in the form of consistent implementation of the following stages: § the formation of integrated assessments of control tasks and identification of the importance of estimated figures using the normalized importance scale; § development of a linear combination of estimated figures, taking into account the additional information about their importance for each control task; § the distribution of control tasks in the order of their practical implementation. The prospective directions of further improvement of the control tasks ranking model in the structure of the information system have been determined. The introduction of the database in the structure of the system with additional information relating to the importance of estimated figures of control tasks ranking. The results of the improvement of information support of officials when extinguishing large fires will increase the efficiency and quality of the forces and facilities of fire and rescue teams.