 This research paper provides a comprehensive overview of the transcriptum of sweet potatoes, including the generation of massive amounts of data from Illumina paired end sequencing, identification of gene ontologies and clusters of orthologous groups, mapping of the data to KGG pathways, and identification of CDNA simple sequence repeat, CSSR, markers. These data will be useful for future studies of sweet potato root development and formation. This article was authored by Huang Lifei, Lu Zhengxia, Zhong Xiyun, and others.