Abstract: Provided is a method for providing an idle mode service using an idle mode service server system interlocking with a contents provider server and at least one mobile communication terminal. In the method, state information is received from the at least one mobile communication terminal, and a push message is transmitted to the at least one mobile communication terminal in consideration of the sate information upon receiving a push message transmission request from the contents provider server. Thereafter, contents are transmitted to the at least one mobile communication terminal according to the push message transmission. Accordingly, it is possible to provide an idle mode service that can be used without the connection to a contents server by a user. Also, specific contents can be provided with or without the request and consent of a user. Consequently, the system and method according to the present invention can control an idle-screen application through a combination between interworking systems.