  The paper suggests a model to account for the common origins of the
asymmetric dark matter (ADM) and matter-antimatter asymmetry. The ADM nature is
a stable hadronic particle consisting of a heavy color scalar and a light $u$
quark, which is formed after the QCD phase transition. At the early stage the
ADM are in thermal equilibrium through collisions with the nucleons, moreover,
they can emit the $\gamma$ photons with $0.32$ MeV energy. However they are
decoupling and become the dark matter at the temperature about $130$ MeV. The
mass upper limit of the ADM is predicted as $M_{D}<1207$ GeV. It is feasible
and promising to test the model in future experiments.
