A driver assistance apparatus for a vehicle provided with ISG (Idle Stop and Go), comprising: an interface and a processor electrically connected to the ISG and the interface, and configured to receive driving information of the vehicle via the interface wherein the processor is configured to perform a predetermined operation for stop control of the vehicle on the basis of the driving information, when the vehicle is stopped in a first state in which the ISG is turned on or in a second state in which a gearshift of the vehicle is positioned at stages other than Park and an engine of the vehicle is turned on, wherein the predetermined operation includes at least one of blocking turning off the ISG, turning off the engine of the vehicle, activation of an electronic parking brake and activation of a foot brake, characterized in that the processor is further configured to: determine whether a predetermined stop preparation condition and stop execution condition are satisfied on the basis of data included in the driving information and perform the predetermined operation when the stop preparation condition and stop execution condition are sequentially satisfied, wherein the stop preparation condition includes occurrence of a crash accident and the stop execution condition includes release of a brake pedal, wherein the processor is further configured to differentially perform predetermined operations according to the magnitude of impulse caused by the crash accident, wherein, when the impulse corresponds to a first level, the processor performs the operation of turning off the engine of the vehicle and when the impulse corresponds to a second level higher than the first level, the processor additionally performs the electronic parking brake activation operation, wherein the processor is configured to perform the electronic parking brake activation operation by generating braking power of the electronic parking brake. an interface and a processor electrically connected to the ISG and the interface, and configured to receive driving information of the vehicle via the interface wherein the processor is configured to perform a predetermined operation for stop control of the vehicle on the basis of the driving information, when the vehicle is stopped in a first state in which the ISG is turned on or in a second state in which a gearshift of the vehicle is positioned at stages other than Park and an engine of the vehicle is turned on, wherein the predetermined operation includes at least one of blocking turning off the ISG, turning off the engine of the vehicle, activation of an electronic parking brake and activation of a foot brake, characterized in that the processor is further configured to: determine whether a predetermined stop preparation condition and stop execution condition are satisfied on the basis of data included in the driving information and perform the predetermined operation when the stop preparation condition and stop execution condition are sequentially satisfied, wherein the stop preparation condition includes occurrence of a crash accident and the stop execution condition includes release of a brake pedal, wherein the processor is further configured to differentially perform predetermined operations according to the magnitude of impulse caused by the crash accident, wherein, when the impulse corresponds to a first level, the processor performs the operation of turning off the engine of the vehicle and when the impulse corresponds to a second level higher than the first level, the processor additionally performs the electronic parking brake activation operation, wherein the processor is configured to perform the electronic parking brake activation operation by generating braking power of the electronic parking brake. determine whether a predetermined stop preparation condition and stop execution condition are satisfied on the basis of data included in the driving information and perform the predetermined operation when the stop preparation condition and stop execution condition are sequentially satisfied, wherein the stop preparation condition includes occurrence of a crash accident and the stop execution condition includes release of a brake pedal, wherein the processor is further configured to differentially perform predetermined operations according to the magnitude of impulse caused by the crash accident, wherein, when the impulse corresponds to a first level, the processor performs the operation of turning off the engine of the vehicle and when the impulse corresponds to a second level higher than the first level, the processor additionally performs the electronic parking brake activation operation, wherein the processor is configured to perform the electronic parking brake activation operation by generating braking power of the electronic parking brake.