Aiming at the hierarchical and modularization characteristics of OLED (Organic Light Emitting Display) unit, based on the analysis of electric, optics, and structure combination process of OLED unit template, the OLED unit customization and combination method based on template customization technology was proposed for the geometric features, process features and joint features of three-dimensional microstructures. Consequently, the typical OLED unit three-dimensional microstructure and OLED unit customization platform were constructed to provide an approach for the design and manufacturing of OLED unit.