A topological network county-level environmental monitoring system, including enterprise terminals, data element input terminals, sewage discharge monitoring instruments, sewage data flow calculators, rapid response instruments for reuse indicators, simple comparison instruments for sewage components and elements, and sewage treatment sonar instruments , sonar data transmitter, reclaimed water flow comparison instrument, reclaimed water fluid element analysis detector, enterprise characteristic equivalent data acquisition instrument, sewage processor, sensor, sewage processor working state collector, sewage processor parameter recorder, system Bus, environmental detection processor, environmental management monitoring platform, cloud database, data storage alarm, enterprise warning display; better realize real-time dynamic enterprise information input and storage, and can also prepare for future investigation and evidence collection , to realize the functions of relevant environmental protection and law enforcement departments from understanding decision-making and execution, and not only to understand some emergencies in the future, but also to reduce the administrative cost of environmental protection law enforcement.