| Product line monitoring was one of the weaknesses in metallurgy industry. Depending on environment, operator sometimes could not see the device, which was in control of him. What he could resort was experience. However, it always resulted in accident and waste. Carelessness was another cause of accident. Besides, manager may not find out the real condition of accident and problem in time without evidence. It was also difficult to lay the responsibility and locate the causation. In the paper, a video monitoring system was developed, which carried out pivotal device surveillance and control using image feedback in process of production. Remote video surveillance system based on embedded server technology was introduced in the paper. Modern digital video technology was applied in real time system to collect and compress video signals, then, transmit digital video in enterprise LAN. System clients could monitor any spots online. Benefiting from MPEG-4 digital compressing standard, the system could record video for more than thirty whole days. It also provided functions of searching and replaying history video for user.The monitoring system was designed to deal with the oxygen lance in oxygen furnace steel. There was gap between oxygen lance and furnace throat, from which flame burn out equipment on flat in oxygen blast process. System collected flame images to analyze flame state. The result was used to control N2 valve in order to put out the fire.The paper described digital video technology and presented a digital video surveillance and control system for metallurgy production. The system comprised three parts: embedded video server, video client and system for monitoring flame between oxygen lance and converter mouth. The paper introduced the frame and modules in developed system. Control with image feedback is the key part. So that theory and arithmetic applied in this part was explained in particular. It related to how to judge the flame status based on environment and output electric current ranged from 4mA to 20mA to DCS, in order that control the flame by N2 valve.To guarantee quality and schedule of development, simplified CMM(Capability Maturity Model) procedure was adopted. Project was managed by making use of measurable plan, document and review. The result proved that software process would be more efficient if import CMM management and accumulate experience constantly. The bug could be discovered earlier. The developing process could be repeated in other similar project. The paper described the implementation of CMM in the project.
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