Abstract: In the context of climate change, the mitigating effect of the heat island effect of sponge city reconstruction has become one of the most concerning issues. Accurately obtaining the surface temperature before and after reconstruction of the sponge city is an important prerequisite to precisely evaluate the mitigation of sponge city reconstruction of the urban heat island. Meteorological observation sites often have a relatively long spatial distance from the sponge reconstruction area, and the non-applicability of their data greatly limits the development of evaluation. In this paper, Qingshan District and Sixin District in Wuhan city are taken as research areas. Based on the remote-sensing monitor and infrared thermal imaging technology to estimate the surface temperature of the spongy areas from the macro and micro view. The regional comparison is an important approach to take the strategy space for time to get the surface temperature changes before and after construction that is used to evaluate the results of sponge city construction on the mitigation of the urban heat island effect. Studies have shown that the sponge city reconstruction has a certain effect on reducing heat island effect on the industrial site (Qingshan District) from the macroscopic point of view, but the reconstruction has no obvious effect on Sixin District with a low degree of exploitation and development. Seeing from the microscopic point of view, the different transformation methods, the various layout types, and even the different colors of the same material have an impact on the mitigating effect of the sponge island heat island. The establishment of regional comparison and the approach to take the strategy space of time can set up an effective evaluation system for the mitigation effect of the sponge city reconstruction of the urban heat island. This method has a great practical and applied value which provides a new way to evaluate the mitigating effect of sponge city reconstruction on urban heat island effect.