According to an embodiment of the present disclosure, a vehicular electrocardiogram measurement device includes an electrocardiographic sensor which is installed in a seat of a vehicle and obtains a patch signal, and a controller, which, on the basis of the patch signal obtained by the electrocardiographic sensor, generates a first request signal for requesting contact of a user's body with a patch of the electrocardiographic sensor. At least one among an autonomous vehicle, a user terminal, or a server according to embodiments of the present disclosure may be combined or associated with an artificial intelligence module, an unmanned aerial vehicle (UAV), a robot, an augmented reality (AR) device, and a device related to virtual reality (VR) or 5G service.