A method and apparatus are provided for reconfiguration of a terminal in a wireless communication system. The method includes transmitting, to a BS, capability information including information associated with the terminal overheating and/or information associated with the terminal power consumption, receiving, from the BS, first configuration information including overheating assistance configuration information and/or preference configuration information for power saving, based on the transmitted capability information, identifying, based on the first configuration information, a triggering event for reporting assistance information including a triggering event for mitigating overheating and/or a triggering event for power saving, determining the assistance information corresponding to the identified triggering event, the assistance information including a preferred number of carriers assistance information, preferred bandwidth assistance information, a preferred number of MIMO layers assistance information, and/or DRX preference information, transmitting, to the BS, the determined assistance information, and receiving second configuration information generated based on the transmitted assistance information.