By using both the neutron monitor data and the Global Muon Detector Network (GMDN) data recorded in global networks monitoring a wide rigidity range of primary cosmic rays, we analyze two long-lasting cosmic ray intensity decreases accompanied by strong anisotropy reported by Buatthaisong et al. (2022). The network data analysis enables to analyze cosmic ray density variations and anisotropy variations separately and accurately. This is not possible in the analysis of single neutron monitor data or muon detector data. From our preliminary analysis, we find periods with increasing and decreasing anisotropies during the long-lasting cosmic ray intensity decrease. We
discuss the possible IMF structure which is responsible to the obtained cosmic ray decrease and anisotropy enhancement.