In recent years, with the rapid growth of China's economy, the more effective use of various resources has received more and more attention. In the practical industrial production, how to observe easier has always been the focus of attention. This demand means that the corresponding system should have strong real-time performance, good stability and high accuracy, etc. To solve the problems in the industrial production, a temperature measuring system which can scan and display results on line in real time is developed according to the infrared temperature measuring theory. The system includes software and hardware and also involves several theoretical difficulties in optical principles and temperature measuring point correction. The innovation points and difficulties of the system are how to use an infrared camera to collect the corresponding infrared temperature data accurately, how to integrate the data and send the data to a PC effectively, how to describe the dynamic observation of the graphics in the PC and how to increase the automatic tracking of high temperature points and other auxiliary functions.