  We present a summary of our results for the light hadron spectrum in quenched
lattice QCD and preliminary ones in two-flavor full QCD. For the quenched
hadron spectrum we find that the mass formulae predicted by quenched chiral
perturbation theory(QChPT) give a good description of our results. Employing
the QChPT mass formulae for chiral extrapolations we conclude that the mass
spectrum in the continuum limit deviates unambiguously and systematically from
experiment. For our two-flavor full QCD results we focus on the dynamical quark
effects on the light hadron spectrum.
