The author dilated upon the development,characteristic of Ovid system,and expatiated on the retrieval methods,tools and technique of the biologic database and agricultural database of Ovid system.

• 笔者详细的介绍了Ovid发展、特点 ,并且对基于Ovid平台的生物、农业数据库主要检索方法、检索工具、检索技巧等作了详尽的阐述