Duchamp was an important representative of Dadaism movement in the early 20th century. He had a far-reaching influence on the art world at that time with his unique artistic concept and work style. Duchamp challenged the traditional artistic concept with an anti-artistic attitude. He flaunted the articles in daily life, such as bicycle wheels and toilets, as works of art, declared that "everyone is an artist", broke the boundary between art and daily life, and put forward the concept of "everything is art". Duchamp subverted traditional painting in a mocking way. He painted two moustaches for this beautiful lady on the replica of Mona Lisa to express his dissatisfaction and contempt for traditional art and challenge authority and norms.