His style focuses on the balance between reality and the ideal. In paintings like the 1892 portrait of his wife, Thadée Jacquet, Aman-Jean uses a narrow picture plane and curving lines to create a decorative effect. He avoids literal transcriptions of his subjects to evoke a specific mood. Critics of the 1890s noted similarities between his paintings and the elegiac tone of the Pre-Raphaelites. Later in his career, his palette and technique shifted under the influence of Pierre Bonnard.

Modern collectors value Aman-Jean for the quiet atmosphere his work brings to a room. His use of harmonious colour and flat decorative surfaces makes his prints suitable for contemporary interiors. These paintings provide a sense of calm without the visual noise of more aggressive art movements. His paintings function as windows into a dreamlike version of the late nineteenth century.