Crash box in the bumper system has important role of absorbing energy. To increase energy efficiency of Crash box, firstly in case of inside shape, thickness and material must be optimized. In case of outside, It is needed appropriate impact point between Barrier and impact beam. We can modify impact point using beam sweep change and according to impact point, shape of crash box collapse is changed. In other words, Impact point is most influent variable for performance of bumper system. In this paper, I study how position of impact point give a influence to bumper system. Firstly, I execute physical test with trolley test model and using this, I make trolley CAE model. Secondary, I make some change of impact point to rotate barrier instead of modifying beam sweep. And it is applying to the trolley CAE analysis. Finally, we verify results of trolley case CAE model through full vehicle CAE analysis.