Being a social system, the Public Administration system exists and functions as part of a Social Organization Microsistem in the Global Society, constituted at the national level. In this way, Public Administration system becomes a subsystem of the Global Social system. Therafore, the Administrative System inust be conceived as a constitutive part of the Social System, being in permanent and meetual relation with the other components of this. In this respect we had decided to specify and determine the place and the role of the Administrative System as part of the Global Social System. To specifly as exactly as possible the role of Administrative System, it`s necessary a systematic analysis of this system, especially the study of the relation beteen the elements of this system as well as between the other elements of the Global Social System. A thorough study of the Administrative System cannot neglect the place and the role it plays as being a part of the Global Social System, as well as the relation between these systems. Because of this, it`s important that the study of Administrave science should begin with the examination of that environment in which the administration is applied as far as this relation is metual; the environment determines itself the administration influences the environment itself.