In the six Nd:glass laser facility, a multi-frame optical diagnostic system with a 0.63 μm, 50 ps (FWHM) probing beam is set up. We use this system to investigate the states of la-ser-produced plasmas by means of simultaneous measurements of interferometry and shadow-graphy or Faraday rotation. Moreover, we have used five-time-frame interferometry or sha-dowgraphy and streaked shadowgraphy in our experiments. The results such as electron density profiles and their evolution, inhomogeneous plasma jet structure and self-generated magnetic field are obtained.