  We use the chiral effective field theory to study the lattice finite-volume
energy levels from the meson-meson scattering. The hadron resonance properties
and the scattering amplitudes at physical masses are determined from the
lattice energy levels calculated at unphysically large pion masses. The results
from the $\pi\eta, K\bar{K}$ and $\pi\eta'$ coupled-channel scattering and the
$a_0(980)$ resonance are explicitly given as a concrete example.
