Database of plants varieties of common knowledge (short for ‘PVCK’) includes information of characteristics, pictures and DNA fingerprints of plants varieties, as well as some useful information, such as varieties name, VCU, protection, promotion, transfer, breeding, cultivation, propagation, preservation and other management and technical information, have functions that to imitate human decision process, selecting similar varieties and reviewing varieties name automatically. Web-based database of PVCK, with a high degree of sharing, can greatly improve exchanging efficiency of variety protection, VCU trial, seed testing and other management information. It’s a important technical support to the authorities of agricultural seed quality control on maintaining the market order. This database is good for saving social costs, it can help seed companies or breeders to select varieties and to develop breeding objectives by providing important reference information. So, based on the study on domestic and foreign plants varieties management system, this thesis points out the key information and functions of plants varieties management and comes to the conclusion of construction method of China PVCK database.