The nanostructure cadmium doped cobalt oxide nanoparticles were prepared by microwave irradiation techniques. The prepared nanoparticles were further characterized using Powder X-ray diffraction, Fourier transform infrared spectroscopy and UV-Vis spectroscopy. The Powder X ray diffraction results shows good crystalline nature. The Fourier transform infrared spectroscopy conforms stretching and bending vibration of metal oxygen groups. UV-Vis spectroscopy results show absorption edges are 204 nm, 220nm prepared nanoparticles additionally optical parameter skin depth, extinction co-efficient, reflectance, refractive index is calculated.