The emergence of social networks and phenomena such as tagging have led to changes in the structure, language, and content of information. The purpose of this study was to analysis of discourse of digital information organization in social tagging. Discourse analysis by Laclau and Mouffe's was used as a research method. LibraryThing were chosen with purposive sampling. End-user as a nodal point located in the center of semantic systems of digital information discourse, language, cataloging, and members were elements articulated around the end-user. Popularity, commonness, participatory, locality, relativeness, fluidity and independence from professional catalogers and standards of cataloging were identified as features of cataloging. Easiness, unlocality, flatness and lack of specific precondition were the features of membership in this database. Language and narration of end-users were a dominate in this database but language and narration of elite in modern discourse of traditional library organization was marginalized. Tags are an important phenomenon for presentation of the user language and construction of the database. Uncontrolled, relative, non-standard, unofficial and de-authorized languages of end–users provide suitable status for deconstructive interpretations from the texts in LibraryThing. Classification, updatness, being free and non-profit were the moments of information organization discourse in LibraryThing. Features of modern discourse of information organization such as obsolescence, hierarchical, authoritarianism are rejecting to the field of discursivity. Discourse of digital information organization articulation stands in contrast to modern systems of information organization in libraries.