Abstract:Some people even claim that in recent times there has been a debate flared up over the alleged need to establish a new scientific direction. Because the critics of securitology as a science derive fro...Some people even claim that in recent times there has been a debate flared up over the alleged need to establish a new scientific direction. Because the critics of securitology as a science derive from the Masaryk University in Brno [Zdeněk KŘÍŽ, Miroslav MAREŠ, Petr SUCHÝ Securitology: Pseudoscience, no Metascience. "DEFENCE & STRATEGY" 2/2007, p. 117-124.], and at the same time securitology has its representatives. Therefore, it is justified to present the subject and methodology of the science (sciences) of security in the Journal DEFENCE & STRATEGY. This paper covers: 1. historical premises and justification of the science (sciences) of security, 2. justification of the subject of research in relation to dimensions (levels) of the researched object, 3. security as the lack of danger and security as a function of various factors, 4. sources and kinds of dangers, 5. security as an objective and/or subjective condition, 6. methodological foundations of the science (sciences) of security, 7. the source of the notion securitology.Read More