Art dealer and collector, Percy Moore Turner was active in London, where he had his Independent Gallery from about 1897. He is best known as a principle advisor to collector Samuel Courtauld, whose collection and bequest form the Courtauld Institute Galleries in London. Turner sold directly to Courtauld and also acted as an intermediary on purchases, including two of the most important, and most expensive, acquisitions made by Courtauld: Renoir's La Loge and Manet's Bar at the Folies Bergère.
Turner was responsible for the several important exhibitions in London. He organized an 1927 exhibition of Gainsborough in Ipswich, England. That same year he was part of the exhibition committee for the Norwich Castle Museum's loan exhibition, to which he lent works by Samuel David Colkett, Joseph Paul, and John Thirtle. Turner acted as an honorary liaison between France and England for the important 1932 exhibition of French art held in London. In 1937 he organized an exhibition of Constable at Wildenstein's Galleries, London.
Turner lectured on English and French art at English universities, and lived in Paris between 1906-1919. In March 1933 Turner became one of the few non-Frenchmen decorated as an officier de la Légion d'Honneur, in recognition of his services to the art world. In 1949 he was elevated to commander.
Percy Moore Turner died in 1950. Several estate sales of his collection were held in London in 1951.
A collection of Turner's papers are housed in the library of the Courtauld Institute of Art in London.