Theoretical generalization of the problem of philosophical outlook of future teachers' beliefs formation is presented in the dissertation; the necessity of theoretical and methodic with organizational aspects of this process improvement in pedagogical universities for future teachers by means of environmental activities in accordance to modern requirements is emphasized in the investigation. The author highlighted the state of the problem in scientific sources and literature. Studding of the problem proved that theoretical principles of improving the process of philosophical outlook of future teachers' beliefs by means of environmental activities were presented in modern science oscillatory; there is a lack of systematic studies of the structure and components of this category, possible levels of definition and criteria, which required a holistic study of formation philosophical outlook beliefs formation of pedagogical universities students by means of environmental activities. The content and nature of the key concepts of research are distinguished by the author in the thesis, these are: "outlook", "belief", "philosophical belief", "means of environmental activities", "philosophical outlook beliefs formation by means of environmental activities". The author distinguishes the philosophical outlook of pedagogical universities students' beliefs by means of environmental activities as the process of self-identity under consolidation of ecological knowledge, philosophical outlook beliefs as for the protection and saving of the natural environment, environmental values and standards of individual conduct to the nature, which is provided through various forms of active methods and means of this process organization and conduct environmental activities. Structural components of philosophical beliefs are specified: (value-motivation component includes personal-values orientations, beliefs about the environment with the following indicators: personal-values orientations and beliefs about the attitude towards the environment; formation of motives for environmental activities in future professional activity; cognitive informational component includes ecological and environmental knowledge that students need for environmental protection, conscious understanding the concept of the environmental problems and environmental activities with the following indicators: existence of the system of knowledge on nature protection, conscious knowledge of ecological concepts, knowledge of the main forms of environmental activities, knowledge of the theory and methods of environmental protection; action with practical component includes practical experience in environmental activities with following indicators: the possession of a methodology of environmental activities organization, the ability to use interdisciplinary knowledge, ability to diagnose and evaluate environmental activities; formation of practical knowledge and skills of environmental activities; ability to develop and implement various forms of environmental activities in future professional activity. Levels of philosophical outlook of pedagogical universities students' beliefs by means of environmental activities described on the basis of revised criteria and indicators means of environmental performance: high, medium, low. Model of the philosophical outlook of pedagogical universities students' beliefs by means of environmental activities, which includes the following components is grounded and tested: methodological and target block (aim, approaches, principles, interaction in the "student-teacher" system); content with the procedure block (content, forms, methods, technologies forming students' outlook by means of environmental performance); results unit (components forming students' outlook of by means of environmental protection, criteria and levels of philosophical outlook). Pedagogical conditions of the philosophical outlook of pedagogical universities students' beliefs formation by means of environmental activities are determined and experimentally tested, these are: content's enrichment of professional disciplines by environmental topics for mastering ecological and environmental knowledge, providing students positive motivation to implement environmental activities by introducing active methods and forms of organization; students involving into active environmental activities. Implementation of these pedagogical conditions promoted the formation of a systemic problem solving on philosophical beliefs formation: students got a formed attitude towards nature, active environmental position and experience in different organizational forms of environmental activities has been achieved by students (environmental actions, contests, exhibitions, expeditions etc.). The relieved results of the study indicate dynamic changes in the levels of positive outlook by means of environmental activities of pedagogical universities students, which are used in the proposed experimental innovations.