Disclosed is an apparatus for controlling DBDM including a first modem that performs an EVDO (Evolution-Data Optimized) or a HSDPA (High Speed Downlink Packet Access) communication, and the second modem that performs a WiMAX (Worldwide Interoperability for Microwave Access) communication, and a method for controlling DBDM, wherein one of the modems selected from the two (first and second) modems that is used for data communication of a user terminal generates a wake up signal to wake up the other modem that is not selected, and the other woken-up modem receives and analyzes communication data, and transmits a data of analysis result to the user terminal and the UART via the one modem performing the data communication.