Abstract: With the enterprise information increasing explosively，mass data storage has been a research hotspot of storage area.To solve problems about data island in mass data storage，avoid data repetition，and realize multidimensional use on unique data source，a method of mass data storage based on IP-SAN is presented firstly.The system uses IP-SAN as data center for underlying hardware support，uses related backup task model that based on quasi-ordering to achieve underlying data implementation mechanisms，uses hierarchical data integration program to achieve high-level application.Secondly，give key algorithm of quasi-ordering based data backup and hierarchical heterogeneous data integration.In the end analyze an actual use case of this solution in digital aircraft design to show its actual application value.