analyzes a CMB anisotropy spatial spectrum and compares it with a theoretical models with different types of the Universe evolution scenario. A sensitivity rising in the CMB investigations caused a detection of the anisotropy. As a result one may find prerequisites of a more detail examination of the physical conditions involved in the Universe birth and evolve. Being high sensitive and multi-frequent COBE experiment (Smoot et al., 1992, Bennett et al., 1994) gives a possibility to careful expanding of our knowledge about the CMB structure and spectrum.

Unfortunately, the Galaxy radiation predominates even at a millimeter wavelength range. This rises a problem of the radiation filtering. The most Galaxy radiation is coming from rather narrow region located along the Galactic plane. The main method to exclude the radiation is to “cut out” the Galactic plane vicinity and to analyze the rest regions on the sky map ( Strukov et al., 1991a, 1991b, Smoot et al., 1992, Bennett et al., 1994, Gorski, 1994, Gorski et al., 1994, Wright et al., 1994b). This method is well known but it works perfectly only if variance data analysis is applied. If we use the Galactic “cut out” in the case of spatial spectrum analysis 