The discussion of the results of an empirical research of the problem of forming the information basis of educational activity of students studying in pedagogical higher education institution is carried out in the article. The information basis of educational activity is considered by the authors as a subsystem of psychological system of activities implemented in the conditions of educational and professional teaching. It is considered in the context of forming other subsystems of activities (motives, purposes, the program, decision making, educational and important qualities) allocated in a single system in system-genetic approach of V. D. Shadrikov. The authors select the concept of professional formation and realization of personality of Yu.P. Povarenkov and his understanding of psychological structure of the subject of work as a basis for the analysis of forming the information basis of educational activity in the conditions of educational and professional teaching. According to the authors of the article, these approaches allow to carry out the analysis of educational and professional development at the personal (psychological) level whereas other existing approaches are limited only to the subject level of the activity analysis. Formation of information basis of educational activity includes qualitative and quantitative changes on different study courses and stages of educational and professional activity. Using methods of correlation analysis, multiple regression analysis, and analysis of the correlation relation the authors set the task to analyze the process of forming the information basis of educational activity in a more detailed way. The methods used in work allowed the authors to specify the existing ideas not only concerning the relationship between success of educational activities and psychological features of its information basis, but also study the influence of the latter on success of students' education. Also, the authors carried out the analysis of interference of the activities realized in teaching process on psychological features of its information basis.