Abstract: Here we review the six-year Galactic plane scanning survey of the Insight-HXMT (Insight Hard X-ray Modulation Telescope), focusing on the monitoring results and analysis of the known X-ray sources on the Galactic plane. During the first six years of its orbital operation, Insight-HXMT spent approximately 1/4 to 1/3 of its total observation time conducting over 3000 scanning observations of the Galactic plane in the wide energy range of 1–100 keV. Long-term flux monitoring was carried out for > 1300 different types of X-ray sources (detecting X-ray signals from approximately 200 celestial bodies), and the monitoring results were compiled and analyzed, including the activity and spectral characteristics of different types of celestial bodies. This paper first introduces the data characteristics and data analysis methods of the Insight-HXMT scanning observations (direct demodulation imaging and light curves fitting), then provides an overall description of the monitoring results of the Insight-HXMT's scanning survey, and finally presents a statistical analysis of the nature of the monitored sources, such as spatial distribution characteristics, variability activity analysis, and hardness ratio analysis.