Superconducting nanowire single-photon detector (SNSPD) is a new type of single-photon detector with high detection efficiency, low dark count rate, low timing jitter, high count rate, and wide spectral response compared to traditional semiconductor single-photon detectors. This allows it to be applied in many applications, such as quantum communication, quantum light source characterization, laser ranging, quantum radar, etc. This paper will give a brief introduction to SNSPD and focus on the progress of SNSPD applications in imaging, mainly including the introduction of different imaging principles and the latest research progress of SNSPD imaging technology based on these principles, and the future development trend of this technology is prospected as well.