  Inspired by the brilliant prospects of the ongoing $B$ meson experiments, the
hadronic charmless $B$ ${\to}$ $SS$ decays are studied by considering the
next-to-leading (NLO) contributions with the QCD factorization approach, where
$S$ denotes the scalar mesons $K_{0}^{\ast}(1430)$ and $a_{0}(1450)$. Branching
ratios and $CP$ violating asymmetries are estimated with the updated values of
hadronic parameters obtained from a covariant light-front quark model, for two
scenarios where the scalar mesons are the $1^{3}P_{0}$ and $2^{3}P_{0}$ states.
It is found that the NLO contributions are very important for the $B$ ${\to}$
$SS$ decays; For the $B$ ${\to}$ $a_{0}(1450)K_{0}^{\ast}(1430)$ and $B_{s}$
${\to}$ $K_{0}^{\ast}(1430)\overline{K}_{0}^{\ast}(1430)$ decays, branching
ratios can reach up to the order of ${\cal O}(10^{-5})$ by assuming that the
scalar mesons are the $1P$ states, and should first be investigated in the
future experiments.
