Nowadays, Miscanthus (Miscanthus spp.) is identified as the most promising lignocellulosic energy crop and is being researched and utilized across the world, e.g. in China, American, Japan and European countries. However, due to lack of a description criterion, information exchange and sharing among Miscanthus researcher is restricted on some extent. Under this situation, this paper tried to establish the formulation principles, methods and contents of the description criterion, data standard and data quality control for evaluating Miscanthus germplasm, breeding and registering new miscanthus varities. In the future, this work can guide the collection, conservation, evaluation of the Miscanthus germplasm.