In this study, we fabricate the zinc oxide nanowires (ZnO NWs) on the electrospun PVDF film using an electrospinning process and hydrothermal method. A water collection effect of ZnO NWs-PVDF film is investigated for fog harvesting application. ZnO NWs-PVDF film of hierarchical nano-structure shows water collection rate of 98 mg/cm²h that is higher than zinc oxide nanowire only surface with 79 mg/cm²h of wter collection rate.