Provided are a system and a method for an online fan meeting. The online chat method among a first user and a plurality of second users, includes granting a bilateral chat right to a first group of users selected from the second users for participating in an online chat with the first user, authorizing an online chat communication among the first user and the first group based on the bilateral chat right, and broadcasting the online chat communication to a second group of users selected from the second users. The second group is granted with a unilateral chat right.