A two-temperature electron energy distribution function (EEDF) is proposed for the non-equilibrium argon atmospheric-pressure plasma. Its continuum emission spectrum,
dominated by electron-neutral bremsstrahlung radiation, is analyzed to determine the electron temperature (T_e) and density (N_e) by optical emission spectroscopic (OES) measurement. It was found that T_e ~ 0.4 eV and N_e ~ 3.3 x 10^{15} cm^{-3} with a discharge voltage of 5.4 kV. The two-temperature EEDF provided a better fit than the one-temperature EEDF.