The present invention relates to a real time integrated management system for a sewage disposal area of a large-scale industrial complex, which enables integrated management by applying IoT technology to devices performing each monitoring and using big data such as weather information in the management of multiple sewage disposal areas such as a large-scale industrial complex or factory complex, the system comprising monitoring devices installed in the sewage disposal areas, storage tanks or water treatment devices, and control systems thereof, wherein the monitoring devices are integrated with an Internet of Things (IoT) function, and provide a sewage disposal area management model on the basis of a distributed computing technique together with big data such as weather data in an integrated management server after measurement values are primarily collected in a local monitoring and control unit to be described later.