The invention provides a converter smelting fire point area temperature continuous monitoring oxygen lance system and a monitoring method and belongs to the technical field of ferrous metallurgy. Theoxygen lance system comprises an oxygen lance, an infrared temperature monitoring system, an infrared temperature sensor protection system, an oxygen lance oxygen supply system and an oxygen lance cooling water system. The oxygen lance oxygen supply system and the oxygen lance cooling water system are connected with the oxygen lance. The infrared temperature monitoring system is mounted inside theoxygen lance. The infrared temperature sensor protection system is connected with the infrared temperature monitoring system. When smelting is started, the oxygen lance cooling system, the oxygen lance oxygen supply system and the infrared temperature sensor protection system start operating. During smelting, an infrared temperature sensor monitors the temperature of a fire point area and returns4-20mA signals, and the 4-20mA signals are processed and fed back, and the continuous monitoring effect on the temperature of the fire point area is achieved. The converter smelting fire point area temperature continuous monitoring oxygen lance system is suitable for continuously monitoring the 30-400t converter smelting fire point area temperature and can achieve the continuous monitoring effecton the temperature of the fire point area under complex conditions during the converter smelting process and provide accurate data for a converter smelting model and the smelting process in real time.