The thermal flow field modal of industrial robot control cabinet(IRCC) is built for thermal characteristics and noise problems of IRCC by using Fluent. Electronic device composed of multimaterials in IRCC was equivalent to the singlematerial electronic device based on massweighted average method. Meanwhile, the design flow of thermal environment protection for IRCC was established and its validity was verified by experiments. Thermal analysis simulation of IRCC was conducted using computational fluid dynamics(CFD) methods. Results show that the cooling effect of blast mode of air cooling is better than that of draw mode of air cooling. When the fan speed increases, the temperature of the heat source in IRCC is decreased continuously, but the radiated noise of whole IRCC increases, so there is the best fan speed zone considering the cooling effect and noise radiation of IRCC.