In this paper,large-area three-dimensional photonic crystals includi ng photonic quasicrystals were fabricated in an iron doped lithium niobate crystal using optical induction method and with the center-perforated multi-optical wedge prisms to generate the multi-beam inter ference patterns.The front and lateral structural characteristics and the Brillouin zone of the photonic cr ystal and the photonic quasicrystal were observed.Numerical simulation was performed to quantitatively analyze the periodic characteristics of the three-dimensional photonic crystal structures.And an app roach is proposed to manipulate the period of three-dimensional photonic crystals through the altera tion of the vertex angle of optical wedges.The Bragg reflection experiment was performed to confirm the per iodicity of the fabricated three-dimensional photonic crystals and measure the interplanar spac ing of the photonic crystal lattice.