  We evaluate the top-quark FCNC productions induced by the topcolor assisted
technicolor (TC2) model at the LHC. These productions proceed respectively
through the parton-level processes g g -> t c_bar, c g->t, c g -> t g, c g -> t
Z and c g -> t \gamma. We show the dependence of the production rates on the
relevant TC2 parameters and compare the results with the predictions in the
minimal supersymmetric model. We find that for each channel the TC2 model
predicts a much larger production rate than the supersymmetric model. All these
rare productions in the TC2 model can be enhanced above the 3-sigma sensitivity
of the LHC. Since in the minimal supersymmetric model only c g -> t is slightly
larger than the corresponding LHC sensitivity, the observation of these
processes will favor the TC2 model over the supersymmetric model. In case of
unobservation, the LHC can set meaningful constraints on the TC2 parameters.
