A sewage discharge control system, which falls within the field of environmental protection. The sewage discharge control system comprises a sewage discharge control sub-system (100), a data receiving sub-system (200) and a remote monitoring sub-system (300), wherein the sewage discharge control sub-system (100) comprises: a remote monitoring and control terminal (RTU) (11), a sewage component detection module (12), a discharge capacity detection module (13) and a data sending module (14); the data receiving sub-system (200) is in communication connection with the sewage discharge control sub-system (100) by means of a wireless transmission network, and the data receiving sub-system (200) comprises: a data collection gateway (21), a data processing computer (22) and a database server (23); and the remote monitoring sub-system (300) is connected to the data receiving sub-system (200), and the remote monitoring sub-system (300) comprises: a monitoring terminal (31), an IC card recognizer (32) and a sewage disch
