  In the present work, we adopt a relativistic constituent quark model to
depict the charmed strange meson spectroscopy, in which $D_{s0}(2317)$ and
$D_{s1}(2460)$ are considered as the $1^3P_0$ and $1P_1^\prime$ charmed strange
mesons, respectively. By using the wave function obtained from the relativistic
quark model, we further investigate the electric transitions between charmed
strange mesons. We find the long wave length approximation is reasonable for
the charmed strange meson radiative decay by comparing the results with
different approximations. The estimated partial widths are all safely under the
upper limits of the experimental data. Moreover, we find the branching ratio of
$D_{s1}(2536) \to D_s^\ast \gamma/D_s \gamma$ are large enough to be detected,
which could be searched by further experiments in Belle II and LHCb.
