Couty is particularly renowned for his depictions of familiar landscapes, ordinary workers and everyday objects, as well as for his religious subjects. Early in his career, he adopted a free, simple and traditional style, before turning to a more characteristic approach, in which he paints clearly defined shapes and uses vivid colors, applied in thick layers. This technique gives his works a vibrant texture and great visual power.
As a member of the Lyon school, he exhibited at the Salon des Indépendants in Paris from 1935 to 1940, at the Salon des Peintres Témoins de leur Temps, and at the Biennale de Menton, where he was awarded first prize in 1953. He also held numerous solo exhibitions, notably in Lyon and Paris between 1945 and 1989. His most notable retrospectives were at the Galerie Larock-Granoff in Paris in 1997 and at the Musée Paul Dini in Villefranche-sur-Saône in 2002.
Jean Couty has also received posthumous recognition. In 2017, a museum was dedicated to him in Lyon, the Musée Jean Couty, highlighting his work and its impact on art in Lyon and beyond. His work, imbued with simplicity and poetry, marked its era and continues to captivate art lovers.