Researches on Cornus wilsoniana, Ricinus communis, and Symplocos paniculata have generated a large amount of data. In order to assist researchers to store and exchange data efficiently, an on-line interactive platform, called Chinese Oil Plants Information System (COPIS), was developed. The authors collected and organized the data of three Chinese industrial oil plants. The system applied AMP (Apache+PHP+Mysql) Web frame based on the standard Browser/Server of three-layer structure. COPIS has realized data query and real-time update, as well as history records for future tracking. Additionally, it provides several analytical tools for C. wilsoniana cultivars. This paper describes the structure and content of COPIS, explains functions of the database, introduces several analytical tools and methods through case study, and briefly evaluates the usage of COPIS.