The detection capability of near-infrared astronomical instruments is constrained by a combination of background factors, including atmospheric absorption, OH airglow, and thermal radiation from the ground and the instrument itself. Over the past decade, relevant research in China has evolved from site characterization and small-aperture prototype testing to unmanned observations at low-background sites and the engineering development of medium-aperture telescopes. This paper first outlines the development history of domestic facilities such as the Xinglong 1.26 m infrared telescope, the Ali 50 cm infrared telescope, the Antarctic Survey Telescope for near-infrared band (AST3-NIR)/Kunlun Infrared Sky Survey (KISS), the Kunlun Dark Universe Survey Telescope (KDUST), and the Large Optical/Infrared Telescope (LOT). It then summarizes our group's progress in instrument development, focusing on two main technical lines: infrared sky background monitoring equipment covering the J, H, and K_s bands as well as the 2.5–5 μm range; and near-infrared cameras based on InGaAs and HgCdTe focal plane arrays, including an H-band low-noise camera and a 1×3 tiled K-band imaging system. This work has established a comprehensive technical chain spanning site background measurement and absolute calibration to deep-cryogenic operation, low-noise readout, cryogenic focal plane tiling, integrated system commissioning, and field imaging verification.