To measure multi-waveband laser atmospheric transmittance, a novel ISP02-style infrared solar radiometer was developed. The hardware composition, optical system design, and workflow of the equipment were described in detail. The equipment was calibrated and the performance indicators achieved by the equipment were given. Atmospheric transmittances of 1.064, 1.315, and 1.54 m were measured using the established method based on direct solar radiation measurements. The actual results and comparison experiments show that the errors are less than 6% compared with the POM02 solar radiometer whose results are obtained by an extrapolation method. The total water vapor measured is less than 7% compared with the POM02. Compared to the extrapolated 3.78 m transmittance, the error is less than 5%. The 1.315 m transmittance is less than 2% compared to that of laser atmospheric transmission assessment software in autumn and winter. The results of the equipment are reliable and stable, providing an effective means to obtain multi-waveband laser atmospheric transmittance at the same time.李建玉|lijianyu@aiofm.ac.cn