Terahertz(THz) imaging is one of the important directions for the application of THz technology. THz imaging systems based on semiconductor photonics devices such as THz quantum cascade lasers(QCLs) and THz quantum well photodetectors(QWPs) have the advantages of compact structure, high spatial resolution, and high imaging signal-to-noise ratio, and have become the research highlights in the related field. In this paper, the research progress of far-field and near-field imaging systems based on THz QCLand THz QWP devices is systematically reviewed, the composition, mechanism, and performance of these THz imaging systems are carefully described, the performance parameters of each kind of imaging system are summarized, the methods to further improve theperformance of THz imaging system are proposed and their application prospects are also discussed.