A method for deploying an airbag outer

A method for deploying an outer air bag, comprising a search range of a front sensor of a vehicle, the updating of a physical size of a search object within the search area in each measurement period of a front sensor (S220), determining a predicted physical quantity in each time unit during each measurement period, and the forecasting of the physical size on the assumption that a certain search object is moved at a constant speed when detecting the particular search object that was searched by the front sensor is stopped (S240), selecting one target object from search objects based on a relative velocity and an overlap of the search object that by means of the updating step or the exterior airbag time (TTE) is obtained, and the deployment of the outer airbag in a case where each of a relative speed and a predicted overlap in a collision of the Zielobjek ts have a predetermined level or more.