His style follows the Neoclassical tradition of his teachers, Jacques-Louis David and Antoine-Jean Gros. Rouget focused on clear lines and balanced compositions. He used a muted palette that favoured earthy tones and soft light. His lithographs show a different side of his skill. In these prints, he explored the textures of fabric and skin with a precision that the lithographic stone permitted. His work avoids the dramatic flourishes of Romanticism, preferring a calm and orderly presentation of his subjects.

Modern collectors value the architectural quality of his work. His portraits and historical scenes provide a sense of historical weight without being overly decorative. The balance in his compositions makes them suitable for structured interior spaces. His lithographs, such as those depicting French royalty or military figures, offer a window into nineteenth-century aesthetics. These prints work well in rooms that require a touch of classical history and formal balance.