The main application background of this paper is using laser cladding technology to process high-speed wire roller. The production lines in the steel rolling industry are different. The wire rollers at different positions in the produce line have different shape. And the different backings of rollers have different process crafts. So it is necessary to explore the mechanics of laser cladding roller with universality. The paper analysed the laser cladding process in theory,and sought one measuring and tracing method adapted to analyzing and monitoring laser cladding process. Based on the temperature field of CO2 laser cladding investigated through high speed camera,the basic things about how to analyze temperature field by Matlab software are introduced,including input and output of the thermal image,the temperature distribution at the direction and its section in molten pool.