  In this paper, we prove that the linearized system of elliptic triangle
homographic solution of planar charged three-body problem can be transformed to
that of the elliptic equilateral triangle solution of the planar classical
three-body problem. Consequently, the results of Mart\'{\i}nez, Sam\`{a} and
Sim\'{o} ([15] in J. Diff. Equa.) of 2006 and results of Hu, Long and Sun ([6]
in Arch. Ration. Mech.Anal.) of 2014 can be applied to these solutions of the
charged three-body problem to get their linear stability.
