This paper looks for the methods to utilize photoarts for expression and communication of the humanistic thoughts and imagination. For that goal this paper firstly analyzed Benjamin's opinion on the development of photography and then looked around the role and meaning of the development of photography. Next we examined the development of photoarts and the role of photography that have developed around the confrontation and association between document and creativity of photography. Next this paper examined that the development of digital photoarts in what manner enlarged the possibility of creative expression and contributed the democratization of arts which Benjamin had told. And then this paper examined the methods to express the humanistic thoughts and imagination those photoartists had developed. We found out those pioneering methods in photomontage of Berlin Dadaists and Russian Avant-gardists and in Brecht's photoepigramm. Next we examined the efficient methods of photoarts to express the humanistic thoughts and imagination those had appeared thereafter. Among those methods firstly we looked into constructed photograph, composite photograph and specially digital pictorialism that used digital composite photograph. Lastly We looked into the combination of photographic image and text and sequence photography. Nowadays, because using digital media we can make the images we want, we can more easily and efficiently use those methods. The development of digital photoarts and digital culture have given the possibility of creatively using the photoarts, but that possibility do not be actualized automatically. The change and variety of expression technique itself can not lead the more valuable and creative culture. The key point is not simply the expression technique, but the expression of profound thoughts and imagination. So far many photoartists deal with the important theme of humanistic thoughts and imagination. However because there have not been active interchange and communication between photoarts and humanities, many photoartists had not been abundant in knowledge about those theme. So their understanding often remain in the sensational and fragmentary. On the other hand many scholar of humanities so far have adhered to language text, so they could have not use the useful media like photoarts for expression of the humanistic thoughts and imagination. In these circumstances if scholars of humanities use the various methods of photoarts those we have examined so far, they can express and communicate their thoughts and imagination more persuasively.