Abstract: For the reason of the difficult to save and manage lots of realities of objects in object_oriented design, such as add,modify,delete,query,based on the advantage of data base management system. The relation of data base management and object attribute, so we can put data base management into oriented object design, and we need to solute two problem:the store of object to data base and data base to object. Because oriented object has some character, such as classes relation and heirship, so we also need to solute them. The method is easy and useful.