There is provided a document providing system including a derivation relationship registration unit that, when receiving an instruction to register a second electronic-document that is an updated version of a first electronic document, registers a derivation relationship indicating that the second electronic document is derived from the first electronic document in a derivation relationship storage unit; an input-output relationship registration unit that generates input-output relationship information indicating an updated electronic document to be provided in response to a document request that designates a requested electronic document based on the derivation relationship registered in the derivation relationship storage unit and registers the input-output relationship information in an input-output relationship storage unit; and a providing unit that, when receiving a document request, obtains an updated electronic document corresponding to a requested electronic document designated in the document request based on the input-output relationship information and provides the updated electronic document.