Growth of well-aligned ZnO nanostructures on various substrates such as GaN, ITO/glass, and sapphire was realized via a simple aqueous solution method at low temperature of $90^{circ}C$. Morphology of ZnO nanostructures grown on various substrates as function of substrate was studied. It was found that ZnO nanostructures is a strong function of substrate. It was clearly observed that the morphology of ZnO nanostructures could be varied by change of substrate. Morphology, crystallinity, and crystal characteristics were carried out by FE-SEM, synchrotron x-ray scattering measurements, and high-resolution electron microscopy, respectively.