In order to meet the needs of precision temperature measurement and solve the problem that the temperature measurement results of standard photoelectric pyrometers are easily affected by the ambient temperature, a multi?point temperature control system is designed. The system realizes the overall temperature control of the inner shell through multi?point control. The thin?film heating sheet is used as the temperature control element, and the self?designed temperature control circuit is adopted. Tests were carried out to verify the temperature control stability and repeatability of the system and the temperature measurement stability of the standard photoelectric pyrometer. The results showed that the multi?point temperature control system fluctuated 0.09 ℃ in 2.5 hours after it was stable, and the temperature control repeatability for three days was 0.1 ℃. At room temperature, a standard photoelectric pyrometer is used to test the silver fixed?point blackbody radiation source. The temperature fluctuations when using the multi?point temperature control system and not using the multi?point temperature control system are 0.1 ℃ and 0.7 ℃ respectively. The multi?point temperature control system of the standard photoelectric pyrometer introduced in this paper has the advantages of good stability, small volume, light weight, easy control and so on. It can effectively meet the precision temperature measurement needs of the standard photoelectric pyrometer and promote the performance improvement of domestic precision temperature measurement instruments.