Plasmonic, including of located surface Plasmon resonance (LSPR) and surface plasmon polariton (SPP), is a special kind of electromagnetic mode in nanometer scale. Plasmonic nanostructures can be generated to improving the conversion efficiency of photovoltaic devices. In the paper, the concepts of plasmonic and their influences by different metal nanostructure were introduced. Then the different principles of light utilization of plasmonic nanostructure in thin film photovoltaic cell was analyzed.