  Doubly-charged Higgs bosons have extensively been searched at the LHC. In
this work, we study the sensitivity reach of the doubly-charged scalar
($H^{\pm\pm}$) in muon collider for the well-known Type-II seesaw scenario.
First, we perform a cut-based analysis to predict the discovery prospect in the
muon collider operating with 3 TeV center of mass energy. In addition to this,
we have also performed a multivariate analysis and compare the cut-based result
with the result obtained from the multivariate analysis. We find that the
cut-based analysis is more significant as compared to the multivariate analysis
in the large doubly-charged scalar mass region. We predict that a
doubly-charged scalar mass, $M_{H^{\pm\pm}}$, upto 1450 GeV can be probed with
$5\sigma$ significance for center of mass $\sqrt{s}= 3$ TeV and integrated
luminosity $\mathcal{L} = 1000\,\textrm{fb}^{-1}$.
