A communication terminal, a communication system and an output method. The communication terminal and the output method include storing, in a memory, a plurality of communication applications including a first communication application and a second communication application, outputting first status information indicating a first status of the first communication application according to a call control information transmitted by the first communication application, and outputting second status information indicating a second status of the second communication application according to a resource that is used by the first communication application in the first status. The communication system includes a publish-subscribe server and the communication terminal, and the communication terminal further includes sending a pub request to publish the call control information and a sub request to subscribe to the call control information to the publish-subscribe server.