Schlemmer joined the Bauhaus school in 1920, a pivotal period in his career. At the Bauhaus, he initially worked as a master of form at the sculpture workshop and later headed the theater workshop. The Bauhaus, under the direction of Walter Gropius, was a hub for avant-garde artists and designers who sought to unify art, craft, and technology. Schlemmer's interdisciplinary approach aligned perfectly with the Bauhaus ethos.

During his tenure at the Bauhaus, Schlemmer developed his most famous work, the "Triadic Ballet" (Triadisches Ballett). This groundbreaking performance combined dance, costume, and stage design to create a unique synthesis of art and movement. The "Triadic Ballet" featured dancers in abstract, geometric costumes that transformed them into living sculptures. The choreography emphasized the mechanical and rhythmic aspects of human movement, reflecting Schlemmer's fascination with the relationship between the body and space.

Schlemmer's artistic philosophy centered on the idea of "the new man," a concept influenced by the technological and social changes of his time. He believed that art should transcend traditional boundaries and that the integration of various disciplines could lead to new forms of expression. This belief is evident in his paintings, which often depict stylized human figures interacting with abstract, geometric environments.

Notable among his paintings is "Bauhaus Stairway" (1932), which captures the dynamic interplay between figures and architectural space. The painting exemplifies Schlemmer's interest in the human form and its interaction with its surroundings, a theme that pervaded much of his work.

In the later years of his life, Schlemmer's focus shifted to more introspective and less public forms of art. He continued to explore the themes of human movement and the integration of art and space until his death on April 13, 1943, in Baden-Baden, Germany.

Oskar Schlemmer's legacy is profound, influencing various fields including visual arts, dance, and theater. His innovative approach to combining different artistic disciplines has inspired generations of artists and performers. The "Triadic Ballet" remains a seminal work in the history of dance and performance art, and his paintings and drawings continue to be celebrated for their visionary approach to the human form and spatial dynamics.