We demonstrate the fabrication and characterization of large area metallic photonic crystals (MPCs) in the form of gold nano-island grating structures. The spectroscopic properties of the MPCs characterized by the angle-resolved optical extinction spectrum measurements show strong couplings between the waveguide resonance modes and the particle plasmon resonance of the gold nanostructures， indicating the success of this fabrication method. The excellent optical responses of the nano-island MPCs with the advantages of large-area fabrication, low cost, and high speed make it show potential applications in optoelectronic devices and sensors.