Abstract: Managing the unstructured large object data item is a conundrum in programming management information systems.In order to encrypt,transfers,store and access the data fast and safely,the paper proposed a new spatial method which stored the data in database by BLOB(Binary Large Object),encrypted,transferred,and operated it by binary data stream.The article introduces in detail of ADO's technology structure,model and working process. The article also describes the method of storing and accessing BLOB data,gives out codes of the programs detailedly based on VC++.NET and ADO technology.