Rawls said that "Rawls did not take into account the continued existence of political games after the disappearance of veil of ignorance", which was a serious mistake. However, it is not entirely correct to emphasize that "the veil of ignorance is a thought experiment, but what it should be, not what it is". Rawls famously said that his political philosophy is a "realistic and possible utopia". Utopia refers to the standardization of his theory, while reality may mean that it is by no means unconstrained in reality. Starting with the analysis of Rawls' works. Of course, A Theory of Justice is Rawls' most important work. In the first part of A Theory of Justice, he refuted the common schools of moral philosophy such as intuitionism and utilitarianism in detail. Then, in the third chapter of this series, veil of ignorance's original state theory is comprehensively expounded. So much for the popular introduction of Rawls, so it should be regarded as a pure thought experiment of Rawls' theoretical thinking.