There is provided a message hub apparatus for efficiently processing service processing messages in an enterprise system. The message hub apparatus stores a value of minimum residence time as minimum time during which the service processing message is to reside in a message queue. The message present in the message queue is transmitted to a service provider on condition that the minimum residence time has elapsed. The apparatus performs a merge processing of the received service processing message and the service processing message which resides in the queue. A history of the merge processing stored in the apparatus is analyzed, and the value of the minimum residence time is modified based on an analysis result.