FSA (Farm Security Administration) photographs of the Depression are one of the most successful work of documentary. In this essay, through the study of three books using FSA photographs: James Agee and Walker Evans's Let Us Now Praise Famous Men, P. S. Taylor and Dorothea Lange's An American Exodus, and an exhibition catalogue The Bitter Years 1935 - 1941 edited by Edward Steichen, the role FSA photographs played in the history of photograpy is considered. The difference between Evanse and Lange in the posture to documentary work is reflected in their books, and this fact means that FSA photographs should not be defined as just an excellent documentary work. In this sense, Steichen's book, treating FSA photographs as a group work, even though is very eloquent story of the years, it shows the limitation of recognition of the results by FSA photographers .