  Using the stellar atmospheric parameters such as effective temperature and
metallicity derived from SDSS spectra for 2200 main sequence (MS) stars which
were also observed by Beijing - Arizona - Taiwan - Connecticut (BATC)
photometric system, we develop the polynomial photometric calibration method to
evaluate the stellar effective temperature and metallicity for BATC multi-color
photometric data. This calibration method has been applied to about 160 000 MS
stars from 67 BATC observed fields. Those stars have colors and magnitudes in
the ranges 0.1 < d - h < 1.4 and 14.0 < d < 21.0. We find that there is a peak
of metallicity distribution at [Fe/H] ~ -1.5 in the distance from the Galactic
plane |Z| > 5 kpc which corresponds to the halo component and a peak at [Fe/H]
~ -0.7 in the region 2 < |Z| < 5 kpc where is dominated by the thick disk
stars. The mean stellar metallicity smoothly decreases from -0.65 to -0.78 in
the interval 0.5 < |Z|< 2 kpc. Metallicity distributions in the halo and the
thick disk seem invariant with the distance from the Galactic plane.
