Abstract: In order to solve the problem of vessel illegal oil wastewater discharge in inland river ,after the current situation of vessel illegal oil wastewater discharge in inland river is analyzed ,an inland marine oil-water separator remote supervisor system based on AIS is proposed in this paper .This system uses ARM 32-bit Cortex-M3 microprocessor as processing unit .It is designed to collect marine oil-water running status information .The processing unit can analyze and handle the running status information ,and fulfill the further display .This system broadcasts the collected running status information to the local maritime department in real time through AIS broadcasting messages channel .The running status information is saved in the SD card through the SDIO interface of signal chip microprocessor .In the remote supervisor end ,the program using the VS2010 platform is designed to decode and display AIS broadcast messages .In this way ,the remote supervisor of vessel terminal is realized .The system can monitor and record the vessel illegal oil wastewater dis-charge in real time .It can enhance the maritime department supervision and monitoring capability in a certain extent ,and improve Chinese inland river vessel oil wastewater discharge status .