His approach is defined by a disciplined use of line and shadow. Unlike many of his contemporaries who sought drama, Liénard focused on clarity and spatial logic. In works like Le Bocage, he uses hatching and cross-hatching to define form without relying on heavy washes of colour. This method creates a sense of order and stillness. His compositions often balance architectural rigidity with natural elements, providing a structured view of the French countryside.

Modern collectors value Liénard for his clean aesthetic and historical grounding. His prints offer a window into the Neoclassical period without the clutter of later romanticised styles. The monochrome nature of his engravings allows them to fit easily into contemporary interiors. They provide a sense of history and quiet sophistication. Because his work was originally intended for documentation, it possesses a timeless quality that avoids the sentimentality found in many 18th-century decorative pieces.