The results on the deep low dispersion (1250 Å/mm at Hɤ, 30° < I < 165°, 195° < I < 210°, |b| < 5°; 7000Å/mm at A band, 50° < I < 115°, b=0°, b=±3.5°) spectral surveys of the MILKY WAY are presented. More than 2250 carbon stars were identified among them 1440 new ones. The C/M5+ ratio increases from 0.02 to 0.3 when longitude varies from 30° to 210°. On the basis of A GENERAL CATALOG OF GALACTIC COOL CARBON STARS the surface distribution of carbon stars has been studied.