Parallel spectral domain optical coherence tomography (PSD-OCT) technology is introduced. Research progresses on the method and system development of PSD-OCT in Zhihua Ding′s group are mainly reported, which includes the wild-field PSD-OCT system based on global optimization, the discrimination method for real and fake defects based on the complex interference signal and phase information, and the approach for correcting motion artifacts based on the spatial-spectral encoding and overlapped data correlation algorithm. The established PSD-OCT system can be used to identify the surface and internal defects of glass, which avoids the misjudgment of fake defects. With the introduction of spatial-spectral encoding units, this system can also be used to correct uncontrolled motions.