Based on Coupled Model Intercomparison Project Phase 6 (CMIP6) simulation data and high resolution daily grid observation data, quantile mapping method and Taylor diagram were used to correct and evaluate the simulation values of extreme temperature index,respectively. It was found that corrected simulation value of each extreme temperature index was closer to the observation during historical reference period (1991-2010).The spatial-temporal variation characteristic of extreme temperature indies in near-term, mid-term and late-term of the 21st century relative to historical reference period in Fujian Province under SSP2-4.5 and SSP5-8.5 scenarios were analyzed. From the perspective of temporal variation, in each period of the 21st century, the extreme temperature indices in Fujian Province showed an increasing trend and the incremental value increased over time.From the perspective of spatial variation, the extreme maximum temperature (TXx) showed a trend of increasing more in northwest inland area and less in southeast coastal area.The spatial distribution of extreme minimum temperature (TNn) was similar to that of TXx, but the warming rate was slightly smaller. The summer days (Su) increased more in the southwest of Fujian, while the warm days (TX90p) increased faster in the southeast area. Based on the generalized extreme value (GEV) distribution, it was found that under SSP2-4.5 scenario, the temperature increase in three periods in the 21st century was relatively uniform and stable, while under SSP5-8.5 scenario, the temperature increase showed an accelerating trend. Under SSP5-8.5 scenario, TXx of 20-year return period in the historical period was likely to occur every year in late-term of the 21st century.