Abstract: A method performed by a terminal in a wireless communication system is provided. The method includes receiving, from a serving base station, a radio resource control (RRC) message including a handover command to new radio (NR) cell, while performing an emergency service on long term evolution (LTE) cell. The method includes identifying whether the NR cell supports a reduced capability (RedCap) function, based on system information on the NR cell. The method includes switching an operation mode of the terminal from RedCap mode to an NR normal mode, in case that the NR cell does not support RedCap function. The method includes, while the terminal operates in the NR normal mode, performing the emergency service on the NR cell through access to the NR cell. The method includes, in response to termination of the emergency service, switching the operation mode of the terminal from NR normal mode to RedCap mode.