The construction of a national unified real-time online environmental monitoring system is an important means of modern environmental monitoring and supervision,through the automatic monitoring of pollution sources and other Internet of Things(IoT)monitoring systems to carry out off-site supervision,can promote the realization of scientific,accurate,legal pollution control,and effectively improve the level of regulatory refinement.This paper studies the off-site supervision mode based on the automatic monitoring of pollution sources from the aspects of online dynamic control of pollution sources off-site supervision system,"1+N"automatic monitoring data labeling rule system,and the establishment of electronic notification and supervision mechanism of abnormal data transmitted by networked automatic monitoring equipment.