Gnoseological relativism describes the cyclicity when the subject (system) cognizing the definite level of synergetic connections with other subjects is bounded by the following triplicity: subsystem-system-oversystem (that was investigated metaphysically by Platon). Thus realizing the last experience (as the degree of the subsystems perception) as well as the purpose of the oversystem the subject itself (system) will act as the transient between the cause and effect forming the own point of view based on the pluralism as a result of inability cyclicity of absolute perception of the development regularities. Then the following stage is the gnoseological relativism as the perception succession since the pluralism characterizing synergetic (hence, limited) worldview gives way to the stage of integration with other systems-knowledge usage. Gnoseological relativism allows one to develop models, which usage can increase the man activity efficiency in any area. Thus, investigations of the relativism gnoseology can be considered as an important step into the formation of the principles of the scientific perception of the XXI century.