This paper presents a Web based Monitoring and Control system. The system was applied to an industrial Rotational Moulding Plastic Oven. The developed system provides remote monitoring of several temperature sensors included in the oven, as well as control of the operation cycle in which the oven works. The oven is a rotational machine therefore no cables were able to be used, so it was necessary to use wireless technologies Like radio frequency to achieve communication between the machine and the monitoring station. The system architecture and the developed software are presented in this paper.