LuTan-1 (LT-1) satellites have been launched for about 4 years. 771,282 images have been distributed to the users of China till 29th October, 2025. Main application purpose of LT-1 was geohazard monitoring and geoinformation production. Interferometric capability was the primary consideration for LT-1. In this paper, we assessed the interferometric applications in the natural resource monitoring industry. First, we overviewed the status of LT-1, the main interferometric products were introduced as S2A, S2B, S3A, S4A, S5A, S5B and S5C. They were geometrically calibrated single look complex (SLC) image, interferometrically calibrated SLC, differential interferometric synthetic aperture radar (SAR, InSAR, DInSAR) products, stacking, MTInSAR, digital orthorectified image, and digital surface model, respectively. S2A were generated after geometric calibration, the geometric accuracy was about 1.53 m after calibration. The baseline was then calibrated for helix bistatic formation data and generate S2B whose accuracy was better than 0.96 m. S3A, S4A and S5A were all used for deformation monitoring, the accuracy values of them were 2.7 mm, 8.6 mm/yr, and 3.7 mm. Geometric accuracy of S5B was 12.5 m, and the height accuracy of S5C was better than 4.7 m. More than 330 geohazards were detected in Guangdong province. The geohazards recognition rate in the field working stage increased from 28% to 47.24%. Even a prediction has been made to avoid disaster for a family and saved 3 people. The application effectiveness has been validated through those years.