A vehicle collision test method comprising the steps of: Setting a speed and a target acceleration of a target vehicle; observing a speed and an acceleration of a subject vehicle corresponding to the set speed and target acceleration of the target vehicle; decelerating the subject vehicle and calculating a time-to-collision when a first threshold time is exceeded after deceleration of the target vehicle; and storing information on the subject vehicle when the calculated time-to-collision is shorter than a preset second threshold time longer than the first threshold time, wherein the step of storing information on the subject vehicle when the calculated time-to-collision is shorter than the second threshold time includes the steps of: setting the speed of the target vehicle to be divided into section intervals; setting the acceleration of the target vehicle to be divided into section intervals; selecting a plurality of scenarios by combining the set section intervals of the speed of the target vehicle and the set section intervals of the acceleration of the target vehicle; and selecting as a selection scenario when the calculated time-to-collision is shorter than the second threshold time for the plurality of scenarios, wherein the first threshold time is set in consideration of a risk determination time and a pedal transfer mechanical time of the subject vehicle and is a time required for the subject vehicle to start decelerating in response to the recognized deceleration of the target vehicle, wherein calculating the time-to-collision is carried out using the equation: TTC = d rel / v rel = d rel / V vut − V tsv, wherein TTC denotes the time-to-collision, d rel denotes the distance between the target vehicle and the subject vehicle, v rel denotes the relative speed between the target vehicle and the subject vehicle, V tsv denotes the speed of the target vehicle, and V vut denotes the speed of the subject vehicle. Setting a speed and a target acceleration of a target vehicle; observing a speed and an acceleration of a subject vehicle corresponding to the set speed and target acceleration of the target vehicle; decelerating the subject vehicle and calculating a time-to-collision when a first threshold time is exceeded after deceleration of the target vehicle; and storing information on the subject vehicle when the calculated time-to-collision is shorter than a preset second threshold time longer than the first threshold time, wherein the step of storing information on the subject vehicle when the calculated time-to-collision is shorter than the second threshold time includes the steps of: setting the speed of the target vehicle to be divided into section intervals; setting the acceleration of the target vehicle to be divided into section intervals; selecting a plurality of scenarios by combining the set section intervals of the speed of the target vehicle and the set section intervals of the acceleration of the target vehicle; and selecting as a selection scenario when the calculated time-to-collision is shorter than the second threshold time for the plurality of scenarios, wherein the first threshold time is set in consideration of a risk determination time and a pedal transfer mechanical time of the subject vehicle and is a time required for the subject vehicle to start decelerating in response to the recognized deceleration of the target vehicle, wherein calculating the time-to-collision is carried out using the equation: TTC = d rel / v rel = d rel / V vut − V tsv, wherein TTC denotes the time-to-collision, d rel denotes the distance between the target vehicle and the subject vehicle, v rel denotes the relative speed between the target vehicle and the subject vehicle, V tsv denotes the speed of the target vehicle, and V vut denotes the speed of the subject vehicle. setting the speed of the target vehicle to be divided into section intervals; setting the acceleration of the target vehicle to be divided into section intervals; selecting a plurality of scenarios by combining the set section intervals of the speed of the target vehicle and the set section intervals of the acceleration of the target vehicle; and selecting as a selection scenario when the calculated time-to-collision is shorter than the second threshold time for the plurality of scenarios, wherein the first threshold time is set in consideration of a risk determination time and a pedal transfer mechanical time of the subject vehicle and is a time required for the subject vehicle to start decelerating in response to the recognized deceleration of the target vehicle, wherein calculating the time-to-collision is carried out using the equation: TTC = d rel / v rel = d rel / V vut − V tsv, wherein TTC denotes the time-to-collision, d rel denotes the distance between the target vehicle and the subject vehicle, v rel denotes the relative speed between the target vehicle and the subject vehicle, V tsv denotes the speed of the target vehicle, and V vut denotes the speed of the subject vehicle. TTC denotes the time-to-collision, d rel denotes the distance between the target vehicle and the subject vehicle, v rel denotes the relative speed between the target vehicle and the subject vehicle, V tsv denotes the speed of the target vehicle, and V vut denotes the speed of the subject vehicle.