This article analyzes the relationship between utopia and science in the light of the historicity of nascent social sciences in the early nineteenth century. The focus of this study is directed to the first writings of Saint-Simon, Robert Owen, and Charles Fourier, who wrote his major works in the first three decades of the nineteenth. The main hypothesis of this article is that it is possible to understand, based on these authors, the singular institution of a utopian social science, which connects the empirical research and the imagination of possible ones. The conclusion is that the utopian science of social facts may be the name of a logic of scientific discovery, which articulates the theoretical experimentation with the discovery of new routes to political configurations.