The present invention provides a method for implementing Q&A function for an electronic document, a method for computer-aided authoring, a method for browsing an electronic document, a computer-aided authoring apparatus, a browser capable of providing Q&A function, a method for providing Q&A service utilizing computers and a system for providing Q&A service. Said method for implementing Q&A function for an electronic document includes: when the writer is writing an electronic document, generating Q&A information used for Q&A function so that the reliability of the generated Q&A information is ensured by the writer; saving said Q&A information in correspondence with said electronic document; and using said Q&A information for providing Q&A function.