Abstract
The thermal evolution of the ice giant planets, Uranus and Neptune, in the solar system is discussed. Previous models required cool initial states of those planets, which is inconsistent with results of planet formation theory. Part of the reason is because the previous models oversimplified the initial temperature profiles in the interiors of the planets. This work has reconstructed the model of the thermal evolution of the ice giant planets, taking the accretion history of those planets into account.