  We present a detailed study of the anomalous top quark production with
subsequent decay at the LHC induced by model-independent flavor-changing
neutral-current couplings, incorporating the complete next-to-leading order QCD
effects. Our results show that, taking into account the current limits from the
Tevatron, the LHC with $\sqrt{s}=7$ TeV may discover the anomalous coupling at
5$\sigma$ level for a very low integrated luminosity of 61 pb$^{-1}$. The
discovery potentials for the anomalous couplings at the LHC are examined in
detail. We also discuss the possibility of using the charge ratio to
distinguish the $tug$ and $tcg$ couplings.
