Piezoelectric energy is produced using smart piezo materials like Lead Zirconium Titanate/PVDF by the application of dynamic load. This load can be applied using various means like fluid force, impact load etc. In this article, significant research for piezoelectric energy harvesting using flowing fluid force are discussed. Here, the force is applied on patch with in various systems like open channel system, closed channel system; flow through nozzle etc, this force is converted in to electric energy by piezo patch. Piezoelectric materials have been used for sensing and actuating applications at a wide range. The article overviews the different ideas of piezoelectric energy harvesting using hydraulic pressure and provide a potential research work in the field of utilizing fluid vibrational energy.