In order to meet the need of the development in interferometric SAR, especially the development of Permanent Scatterers InSAR(PS-InSAR) in these years, we develop a new software called CAESAR-XInSAR at the Remote-Sensing Satellite Ground Station, CAS. Both conventional InSAR and PS- InSAR are considered in this system. It supports the interferometric processing from SAR SLC data to end products of DEM or surface deformation map. It is organized in different modules and developed in Visual C++ 6.0 environment on PC under windows operating system. It is currently at the stage of the development from scientific platform to operational system. In this paper, the organization and the modules of this system are described and the results from CAESAR-XInSAR are also processed in the end.