  In this paper, the renormalization-group equations for the
(flavor-conserving) CP-violating interaction are derived up to the dimension
six, including all the four-quark operators, at one-loop level. We apply them
to the models with the neutral scalar boson or the color-octet scalar boson
which have CP-violating Yukawa interactions with quarks, and discuss the
neutron electric dipole moment in these models.
