In order to promote the research and application of pseudo dynamic test method, based on the NetSLab's communication function, a remote collaboration pseudo dynamic test platform NetSLabOSR for building structures was developed. For the remote collaboration tests, using the communication model provided by NetSLab, long distance communication among computers located in different sites was realized, and timely transmission and feedback of operation information was achieved. NetSLabOSR provides test capabilities for conducting the substructure pseudo dynamic tests through both traditional local method and distributed remote collaboration with numerical simulation codes developed by the authors based on OpenSees. Using NetSLabOSR test platform, substructure pseudo dynamic tests of planar and space composite frames with steel tube concrete columns and steel beams have been carried out, which verifies the validity and stability of the NetSLabOSR test platform, as well as the efficient communication performance and the test accuracy.