His style is defined by the *tableaux des modes*, a genre he invented to depict elegant domestic scenes. De Troy gave attention to the textures of silk garments and the carved details of furniture. Paintings like *Pan and Syrinx* or *The Triumph of Mordecai* demonstrate his ability to handle large-scale subjects. His sketches, including *Studies van mannen en hand*, show a focus on the mechanics of human movement. He used light colouration to maintain clarity within complex compositions, ensuring the central figures remained visible despite active poses.

Modern collectors value de Troy for his ability to capture the atmosphere of a room. His paintings are more than just historical documents; they are studies in interior design and social interaction. The technical skill in his draftsmanship, seen in drawings like *Deel van een studie van een liggend figuur*, provides a sense of classical rigour. These prints offer a window into a world where every object and gesture was a deliberate choice. For a contemporary home, his paintings provide a look at the origins of modern leisure and fashion.