Recently, the control of size, morphology and dimensionality in inorganic materials has been rapidly developed into a promising field in materials chemistry. 3D nanostructured flower-like ZnO architecture with different size and shapes have been simply synthesized by hydrothermal process, using zinc acetate and ammonium hydroxide as reactants. In this study, the ZnO thin-films were deposited by RF magnetron sputtering in other to get high adhesion and uniformity of 3D nanostructured flower-like ZnO architecture on a $SiO_2$ substrate. The XRD patterns identified that the obtained the nanocrystallized ZnO architecture exhibited a wurtzite structure. SEM images illustrated that the flower-like ZnO bundles consisted of flower-like or chestnut bur, which were characterized by polycrystalline and (002) preferential orientation.