  We study the $\rm{\gamma}$-ray luminosity and beaming effect for Fermi
blazars. Our results are as follows. (i) There are significant correlations
between $\rm{\gamma}$-ray luminosity and radio core luminosity, and between
$\rm{\gamma}$-ray luminosity and $\rm{R_{v}}$, which suggests that the
$\rm{\gamma}$-ray emissions have strong beaming effect. (ii) Using the
$\rm{L_{ext}/M_{abs}}$ as an indicator of environment effects, we find that
there have no significant correlation between $\rm{\gamma}$-ray luminosity and
$\rm{L_{ext}/M_{abs}}$ for all sources when remove the effect of redshift.
FSRQs considered alone also do not show a significant correlation, while BL
Lacs still show a significant correlation when remove the effect of redshift.
These results suggest that the $\rm{\gamma}$-ray emission may be affected by
environment on the kiloparsec-scale for BL Lacs.
