The design of measuring system based on virtual instrument for object infrared radiation intensity is described in accordance with the radiation source. The components selection and the principle of the compositions such as detector, controller and processor are analyzed. The flow chart of the software is given. The atmospheric permeation rate is calculated by collecting environmental temperature and humidity information in order to extremely control the ambient environment influencing the measured results. The system is capable of measuring various objects infrared radiation intensity with running stability and high accuracy.