Abstract: The inland ship sanitary sewage discharge monitoring system is developed to meet the demand for remotely monitoring of inland ship sewage discharge. The overall architecture of the system is designed. The system, as a platform design, uses new technologies, such as sensor collaboration, remote data transmission, and cloud computing. Physically, the system is composed of shipborne terminals and a shore-based monitoring platform. It has functions to measure key parameters of sewage, detect and analyze illegal discharge and generate alarm signal with the amount of discharge calculated. PCs can be used as terminals and mobile terminals are available. Data transmission mode can be switched according to the location of terminals.