Provided is a method of a control device to set an alarm. The method includes: discovering a first control target device including an alarm service and a second target device including a content providing service; receiving a device list registered for the alarm service from the first target device; receiving available content information from the second target device; selecting an alarm target device and a content from the device list and the content information; and transmitting an alarm setting request message to the first target device on the basis of the selected alarm target device and content.