Abstarct: In this tesis, mextal oxide laxyers include of TiO2 nanocrystaline laxyer with reactive DC-sputtering method and NiO laxyer with electrodeposition method deposited on FTO substrates. TiO2 is a good cathodic electrochromic material, when ions into it become colored and NiO is also a very good anodic electrochromic material that colored when it is ion exit. Use from two complement each other when changing color. Structural and optical properties of these laxyers enables us to identify properties of nano scale features they can use to make smart windows. Morphology and structural and optical properties of nano crystalline laxyers by X-ray analysis (XRD), scanning electron microscopy (SEM), optical spectroscopy (UV-Vis) and cyclic voltamometry (CV) were evaluated.