As a representative figure of the stylistic restoration principle, Eugène Emmanuel Viollet-le-Duc found that the beauty of architecture comes from its own structure, and the rationality of structure is the foundation of the building, through his own practice and survey. Therefore, he highly praised the restoration theory based on rational thoughts and the Gothic Revival. He continuously put his methods into practice within restoration projects. Meanwhile, he also spread the idea through a large library of books and paintings which had a great impact on the style of new high-tech, Art Nouveau and structure rationalism. This paper tries to discuss the essence of Eugène Emmanuel Viollet-le-Duc’s rational thoughts and its relationship with other theories at different times and in different places. Furthermore, the impact of his thoughts on representative figures of the early Modern Movement such as Anatole de Baudot, Auguste Perret and Le Corbusier will also be discussed.