Ion Doppler Spectroscopy (IDS) is a method for diagnosing ion temperatures in plasmas that does not rely on beam injection. In a plasma, characteristic spectral lines produced by electron transitions in excited states of specific ions exhibit a certain thermal broadening (Doppler broadening). By measuring the Doppler broadening and frequency shift of ion characteristic spectral lines, analysis of ion temperature and flow velocity can be achieved. The IDS diagnostic and automated data analysis system developed by Startorus Fusion can achieve measurements of plasma temperature distribution and flow velocity distribution without beam injection, providing centimeter-level spatial resolution and millisecond-level time resolution.