Traditional videometric approach could not be used to measure the pose deformation of objects in a large viewing field or between intervisible objects in the large structures. Pose Relay Measurement System Using Multi-cameras (PRMSUMC) could be used to overcome the difficulties encountered in applying traditional videometric to deformation measurement between non-intervisible objects. First, basic principle of PRMSUMC was discussed. Then, functional module as well as flow chart of the software design was proposed based on the structure of the system’ hardware. Finally, Client software and host software were designed and developed according to the classic Client/Server architecture in Visual C++ platform. A large number of experiments conducted both outdoors and indoors and real ship measurements show that the software system is designed stably and reliably, and it is convenient to use as well as good extendibility.