Ernst's artwork often featured dream-like scenarios, biomorphic forms, and an emphasis on texture and materiality. His artistic influences included artists such as Pablo Picasso, Salvador Dalí, and André Breton. Some of his most notable works include 'The Elephant Celebes,' 'The Robing of the Bride,' and 'Untitled (Two Children Are Threatened by a Nightingale).' Ernst's contribution to American art is undeniable, and he is widely regarded as one of the pioneers of modernism.

His innovative use of techniques such as frottage and grattage allowed him to create complex, multi-layered artworks that continue to inspire artists today. Through his artwork, Ernst explored themes of the subconscious, the irrational, and the relationship between art and reality. His legacy can be seen in the work of subsequent artists who have been influenced by his unique style and techniques.