EN
This paper presents an environment as life conditions and as a source of risks and crisis. Contemporary changes in environment from point of view possible influence on security situation, on health threat, life and life environment and property are characterized. There is identified possible approach to define and to classify of security in second part. We deal with explanation of military and non-military security. At last part there are define key problems of theory and praxis crisis management: theoretical and methodological approaches, principles and rules for managing of social systems in crisis situations, process of crisis management as a cycle application of functions considering the prevention, preparation, mitigation, response and the recovery processes.