In simultaneous phase-shifting interferometry system based on three-bucket algorithm, three CCD cameras of the same characteristics are utilized to pick up the three space interferograms synchronously, so that the space resolution of the interferogram can be improved effectively. One of the multi-CCD-synergy system is selected as the master to associate the sync-signals with the others. A central circuit of sync-signals generation and signal-cooperation is designed by the video sync-signal generator CXD1217Q as the main IC. Meanwhile, a circuit of the drive and distribution of sync-signals is presented by using the video operation amplifier OPA692.