Robert Venturi's works and writings stood in opposition to the functionalist mainstream of 20th-century American architectural design, and he became a witty and articulate spokesman for the unorthodox elements in the architectural world. His books "Complexity and Contradiction in Architecture" (1966) and "Learning from Las Vegas" (1972) are considered the manifesto of postmodern architectural thought. He opposed Mies van der Rohe's famous saying "less is more" and believed that "less is bare". He believes that the people do not understand the language of modernist architecture, and the buildings that the people like are often ordinary, lively, decorative, and metaphorical. He believes that the appearance of the casino city of Las Vegas, including narrow streets, neon lights, billboards, fast food restaurants and other trademark shapes, exactly reflects the preferences of the people. If architects want to talk to the people, they must ask Las Vegas Garth learns. As a result, the market culture that was considered low-level taste and excitement-seeking in the past was able to gain a foothold on the academic stage.

Robert Venturi’s representative works include the Mother House in Philadelphia, the Franklin House in Philadelphia, the National Gallery in London, the Allen Art Museum at Oberlin University in Ohio, and the Marlborough Blanche in Atlantic City, New Jersey. Renovation of Mu Hotel, etc.

Venturi declared that he was a "modern" architect, and he criticized postmodernism for "only emphasizing the recycling of history, which is restoration of the past."