The coincidence methods were used to measure the electron light output and the proton light output in a 2inx2in. NE-213 liquid scintillator. The results indicated that the electron light output was extremely linear with respect to the electron energy in the range from 0.48 MeV to 3.4 MeV, and that the half-height of the Compton edge was 4.8+ 1.8 76 higher than the maximum Compton electron energy. Of the same light output, the electron energy (E, in MeV) versus the proton energy (Ep in MeV) u-as fitted by least squares fitting of the experimental data to E=0.76906-0.51730 Ep+0.23780 Ep^2-0.01621 Ep^3, for proton energy ranging from 1.95 MeV to 6.3 MeV. The half-height of the raw spectrum edge was about the maximum recoil proton energy within the experimental error.