  It was recently reported that there may exist monochromatic $\gamma$-ray
emission at $\sim 130$ GeV from the Galactic center in the Fermi Large Area
Telescope data, which might be related with dark matter (DM) annihilation. In
this work we carry out a comprehensive check of consistency of the results with
the DM annihilation scenario, using the 3.7 yrs Fermi observation of the inner
Galaxy, Galactic halo, clusters of galaxies and dwarf galaxies. The results
found are as follows. 1) Very strong constraints on the DM annihilation into
continuous $\gamma$-rays from the Galactic center are set, which are as
stringent as the "natural" scale assuming thermal freeze-out of DM. Such limit
sets strong constraint on the DM models to explain the line emission. 2) No
line emission from the Galactic halo is found in the Fermi data, and the
constraints on line emission is marginally consistent with the DM annihilation
interpretation of the $\sim 130$ GeV line emission from the inner Galaxy. 3) No
line emission from galaxy clusters and dwarf galaxies is detected, although
possible concentration of photons from clusters in 120-140 GeV is revealed. The
constraints from clusters and dwarf galaxies are weak and consistent with the
DM annihilation scenario to explain the $\sim 130$ GeV line emission.
