  We study collider phenomenology of inert triplet scalar dark matter at the
LHC. We discuss possible decay of Higgs boson to dark matter candidate and
apply current experimental data for invisible Higgs decay and
$R_{\gamma\gamma}$ to constrain parameter space of our model. We also
investigate constraints on dark matter coming from forthcoming measurement,
$R_{Z\gamma}$ and mono-Higgs production. We analytically calculate the
annihilation cross section of dark matter candidate into $2\gamma$ and
$Z\gamma$ and then use FermiLAT data to put constraints on parameter space of
Inert Triplet Model. We found that this limit can be stronger than the
constraints provided by LUX experiment for low mass DM.
