Abstract: In order to realize the intelligent and automatic supervision of pollutant emissions from heavy-duty diesel vehicles, The CPC Central Committee and the State Council Guidance on Comprehensively Strengthening Ecological and Environmental Protection and Resolutely Fighting the Battle of Pollution Prevention and Control (Zhongfa 2018 No. 17) and other policy documents put forward the construction requirements of "remote online monitoring system for heavy-duty vehicle emissions". In 2021, the Ministry of Ecology and Environment issued a series of standards of Technical Specifications of Remote Emission Supervision System for Heavy-duty Vehicles (HJ 1239-2021), which standardized the construction of the remote monitoring system. The necessity and significance of standard formulation, as well as the standard structure, positioning and main technical content formulation ideas and basis were fully interpreted. Combined with the current progress of heavy-duty vehicle emission remote monitoring, it was found that there were common problems such as low data quality and slow progress of data application models. Some suggestions such as building the data mining analysis and application models were put forward for standard implementation. It provided the reference for heavy-duty vehicle production enterprises to carry out heavy-duty vehicle networking and for competent departments to implement standards.