Abstract: A networked structural laboratories system is established for shared use of laboratory facilities and improving testing capacity. The system consists of a network based communication platform and a series of remote collaborative pseudo-dynamic testing platforms. A simplified single-degree-of-freedom platform and a multi-degree-of-freedom testing platform are developed for simulating the seismic response of bridge structures. Both of the two testing platforms consist of four types of modules, namely control center, physical tester, virtual tester and observer. The control center organizes the testing procedure and handles numerical integrations. The physical tester and the virtual tester generate restoring forces of substructures by operating testing facilities and computing resources respectively. The observer monitors the testing process and shares the testing results without any interference of the test. A standard ActiveX control is utilized to provide transferring of control signals and feedback data between the physical tester and MTS Electro-hydraulic servo system. A series of virtual and physical hybrid tests of bridge structures under earthquake excitations were carried out. The results validate the reliability of the testing platforms.