  One of the most important problem of the blazar astrophysics is to understand
the physical origin of the blazar sequence. In this study, we focus on the GeV
gamma-ray variability of blazars and evolution perspective we search the
relation between the redshift and the variability amplitude of blazars for each
blazar subclass. We analyzed the Fermi-LAT data of the TeV blazars and the
bright AGNs (flux $\geq$ 4$\times10^{-9}$ cm$^{-2}$s$^{-1}$) selected from the
2LAC (the 2nd LAT AGN catalog) data base. As a result, we found a hint of the
correlation between the redshift and the variability amplitude in the FSRQs.
Furthermore the BL Lacs which have relatively lower peak frequency of the
synchrotron radiation and relatively lower redshift, have a tendency to have a
smaller variability amplitude.
