This paper shows that the plum centerline temperature of sub-scale spinning motor is measured by using a non-intrusive IR scanner in this paper to analyze the influence of spin motion on plume centerline temperature of the spinning solid-propellant rockets. The results show that the average error of temperature measurement is below 3.5% even with a 10% error of estimated emittance value and the temperature distribution diagram illustrate that the plume temperature near the nozzle exit is low during the early burning stage. The particles with high temperature eject from nozzle at a shorter period and emit high-intensity infrared that increase the plume temperature near the nozzle exit. Regardless of plume temperature level at the nozzle exit and the effects of rocket spin, the plume temperature for secondary combustion of flammable gas at different conditions are the same, and the average temperature measuring error is less than 6%.