A driver assistance apparatus for a vehicle may be provided with Idle Stop and Go (ISG), and the driver assistance apparatus may include: an interface configured to receive information; and a processor. The processor may be configured to: receive, through the interface, driving information of the vehicle; and based on a determination that the vehicle is stopped in a first state in which the ISG is enabled or that the vehicle is stopped in a second state in which a gearshift of the vehicle is engaged in a Park (P) mode and an engine of the vehicle is turned on, perform a stopping operation for the vehicle based on the driving information of the vehicle.