Chinese National Rice Data Center (http://www.ricedata.cn, CRDC) is an integrated scientific platform for rice research across multiple subjects. Firstly, the database for Chinese rice varieties and their genealogy (DRVG) is established including a fingerprint dataset for widely-grown varieties and a dataset for the excellent germplasm. Moreover, the genealogy tree and the assessment method of backbone parents are developed for DRVG. Secondly, the database for rice functional genes (DRFG) is built, which introduces rice functional genes collected from the references at home and abroad and have two chart generation programs for genetic maps and gene structures through browsers. In addition, the DRFG sets up a dataset of molecular markers for important functional and beneficial genes in breeding. Thirdly, an ontology system is independently produced for knowledge management, and applied to manage the database for DRFG and reference documents. The CRDC platform builts a bridge between biologic data and breeding needs, which is widely used in the domestic and exerts a growing influence.