Abstract: Transparent and conducting oxide (TCO) glass electrode is the essential part of solar cell system. Fluorine-doped tin oxide (SnO2:F) (FTO) and indium-doped tin oxide (SnO2:In) (ITO) are TCO layers of glass electrode. In this work, type of semiconductor has been determined by hot point probe method and optical properties of FTO and ITO have been studied to improve the performance of solar cell efficiency by UV-VIS spectroscopy. The comparison of optical properties of FTO and ITO shows that ITO has low absorbance, high transmittance and low reflectance. The band-gap energy of FTO is 3.65 eV and that of ITO is 3.75 eV.