  For a fixed seed $(X, Q)$, a \emph{rooted mutation loop} is a sequence of
mutations that preserves $(X, Q)$. The group generated by all rooted mutation
loops is called \emph{rooted mutation group} and will be denoted by
$\mathcal{M}(Q)$. Let $\mathcal{M}$ be the global mutation group. In this
article, we show that two finite type cluster algebras $\mathcal{A}(Q)$ and
$\mathcal{A}(Q')$ are isomorphic if and only if their rooted mutation groups
are isomorphic and the sets $\mathcal{M}/\mathcal{M}(Q)$ and
$\mathcal{M'}/\mathcal{M}(Q')$ are in one to one correspondence. The second
main result is we show that the group $\mathcal{M}(Q)$ and the set
$\mathcal{M}/\mathcal{M}(Q)$, determine the finiteness of the cluster algebra
$\mathcal{A}(Q)$ and vise versa.
