Optical emission spectrum characteristics of surface dielectric barrier discharge plasma aerodynamic actuator with different electrode configurations are measured under different applied voltages and driving frequencies. Emission spectrum indicates that N2(C3Πu) molecules and N2+(B2Σu+)ions are the major emitting species. N2(C3Πu) molecule's rotational temperature is also calculated. When the inner distance of an electrode pair increases from 0mm to 1mm, rotational temperature increases from about 500K to 900K, which may be due to the discharge mode shift. With the same electrode configuration, rotational temperature decreases along with the applied voltage increasing while remains unchanged under different driving frequencies. Relative intensities of first negative system(FNS) of N 2+ (391.4nm) and second positive system(SPS) of N 2 (380.5nm) are almost same with different electrode configurations, applied voltages and driving frequencies.