In the article types of information-analytical systems are considered, their classification is made. The analysis of researches on the problem of introduction of IAS in business and educational processes of the educational institution is carried out. The components of these systems and the main content technological lines, which should be considered when improving the qualification of teachers of informatics, are determined. The kinds of IAS that are used by the teachers of informatics in their professional activity and perspectives from which IAS should be considered in the educational activity are considered: database management systems, Internet information resources. Their analysis, criteria and indicators influencing efficiency and effectiveness are presented. The place of information-analytical systems in the professional activity of the teacher of informatics is determined. The problems faced by the system of postgraduate pedagogical education for the support of informatics teachers at advanced training courses are outlined with the aim of teaching designing of information-analytical systems, development of informational competences and raising the level of information culture of all subjects of educational process. The design and development of IAS by pupils and teachers ensures the objectivity of learning activities, the acquisition of academic achievements by students (participation and victories in competitions, tournaments, competitions), the release of their creative potential, the continuous professional growth of the teacher, the orientation of the educational process to the development of the individual and the satisfaction of his educational needs, development of software and hardware ICT infrastructure of an educational institution. Understanding the ability of the teacher to use IAS in their professional activities can significantly improve management organization and conduct the educational process, develop information culture of all subjects of the educational process.