Starting from the point of view to be successful preschool teachers is not enough just acquired competences but also question of their beliefs, a reflection of their own professional work and development, the aim of the study was to provide insight into recent findings on the application of biographical methods in qualitative research and qualitative analysis of preschool teacher’s educational biography contribute better understanding of key events in their professional development. Better understanding and development of preschool teachers professionalism and professional identity, and thus ensuring the welfare of the child, may contribute insight in the course of professional development 13 educators, their views on the responsibilities, roles, functions and values in work, insight into the motivational factors for the further development of this vision of quality and competent educator. Using the results of research it is possible to conclude that the articulation and testing the values, beliefs and attitudes of preschool teachers using the educational biography and forming a reflective group of educators within the organization of the utmost importance to their professional development and improving the quality of kindergarten. Professional training, work on yourself, thinking and questioning of practice time is leading to changes and creating a better environment for children.