The 27-day variations of galactic cosmic ray (GCR) anisotropy and intensity are studied based on the neutron monitors data for the A > 0 and the A < 0 polarity periods of solar magnetic cycles (for the A > 0 polarity period of the solar magnetic cycle lines of the interplanetary magnetic field (IMF) are directed outward from the northern hemisphere, while for the A < 0 polarity period the opposite situation takes place). It is shown that the amplitudes of the 27-day variation of GCR anisotropy are greater in the A > 0 polarity period than in the A < 0 polarity period of the solar magnetic cycles being in good correlation with the similar changes of the amplitudes of the 27-day variation of GCR intensity. These changes in the amplitudes of the 27-day variations of galactic cosmic ray intensity and anisotropy are caused by the alternating radial component of the drift stream S_d of galactic cosmic rays in different polarity periods of the solar magnetic cycles. In the A > 0 polarity period the stream S_d is directed outward from the Sun, while in the A < 0 polarity period of the solar magnetic cycle the stream S_d has vice versa direction.