Disclosed is a method, system, and non-transitory computer-readable record medium for protecting content copyright in a chatroom. A content protection method includes adding, by at least one processor, a mark to content in a chatroom, the mark including chatroom information for identifying the chatroom in response to a user request from a user associated with the content in the chatroom, and executing, by the at least one processor, a function corresponding to the user request using the content to which the mark is added.