Raman can change the intensity of a G-band and change the Raman frequency of a 2D-band.The transmission spectrum is obtained by measuring the transmittance of the layer information.The single-layer graphene has a penetration of 97.7%.Atomic force microscopy can determine the roughness of the surface. In contrast, optical microscopy provides fast imaging speeds that can be used as a quick and intuitive way to visualize the graphite layer and obtain relevant information about multilayer graphene. This creation uses multi-spectral color image reproduction technology and is matched with microscopes, CCDs, and other devices.It can be applied to the rapid detection and identification of low-layer graphene on transparent substrates or other industries (such as yield and quality).