介绍一种自行研制的光纤高温计及其测量模型;解决了辐射测温过程中因发射率瞬态变化而影响测量结果的问题;进行了测量系统的分析;给出了实验结果. A self-developed optical fiber pyrometer and its measurement model are introduced. The problem that the measurement results are affected by the transient change of emissivity during the radiation temperature measurement is analyzed. The measurement system is analyzed and the experimental results are given.