Currently, there are few products which can track high temperature targets in the market. Because most of the products in the market only have a temperature measuring function, it is not far enough to meet the different demands in various applications. An automatic tracking system which can track high temperature targets in real time is proposed. Its hardware system design, software design and algorithm principle are presented in detail. The experimental result shows that the system not only can implement the display of infrared images, but also can measure the temperature of the targets accurately and track them automatically in real time.