Abstract: This paper proposed based on PLC remote sewage intelligent monitoring system design method.Through the acquisition equipment long time monitoring the changes of the sewage, using the wireless network technology, real-time transfer sewage site, in view of the existing signal transmission, and puts forward a lot of noise signal denoising algorithm, combined with the requirements of the wastewater monitoring system, is given based on programmable controller of sewage monitoring control system design, and the hardware structure of each part of the software design.The scheme design of the system can be effective monitoring sewage leak and feedback information, and satisfactory results have been obtained.