A method and device for cleaning up a terminal resource and a terminal are provided. The method includes: receiving a cleanup instruction, and acquiring a resource saved on a terminal according to the cleanup instruction; processing the resource, and saving the processed resource, in which a storage space occupied by the processed resource is less than a storage space occupied by the resource; and querying whether a resource is saved on a server, if the resource is saved on the server, displaying deletion prompt information, and deleting the resource according to an operation executed by a user.