As the economy and society enter the period of rapid post-industrialization, the pressures on resources and the environment are becoming more obvious. Therefore, the environmental protection work faces more challenges. There are many important elements in the environmental emergency detection system, such as emergency monitoring data, information, and command transmission. In order to deal with all kinds of sudden environmental pollution accidents in a timely manner and to reduce the damage to the environment caused by accidents, we need to ensure the safety of the environment. Therefore, we must use scientific methods to manage sudden environmental pollution accidents. In this paper, we combine Internet technology, GIS technology and multimedia database technology, and establishes a decision support system for emergency monitoring and disposal based on multimedia information systems. Its basic hardware includes environmental risk source monitoring, emergency monitoring, command and dispatch, environmental emergency network and environmental emergency monitoring center construction. The software system includes basic software environment, environmental emergency monitoring and command information sharing platform, application software and unified portal. The entire system is integrated according to an organized organizational system, providing detection systems and early warning systems for sudden environmental pollution incident prevention and emergency response. The system we designed can collect and process relevant information in a very short time. The system can quickly handle emergency decision-making and minimize the adverse effects caused by sudden environmental pollution accidents. Experiment results show the well performance of the proposed system. The multimedia based user interface guarantees the user experience.