A method, apparatus and system for creating a discussion group based on instant messaging. Creating a new discussion group in response to a discussion group creating request sent by a client according to a page of an original discussion group, and taking members of the original discussion group as members of the new discussion group; receiving the members and a subject of the new discussion group that are added, deleted or changed on an editing page and sent by the client, and updating the same to the editing page of a local database; generating, in response to a confirmation request sent by the client, a discussion page and an instant messaging link associated with each other, and sending the instant messaging link to clients of all the members of the new discussion group; and entering, by the client, the new discussion group through the link.