The present invention provides an electric brake system in which an actual control variable in the electric brake when overshooting is generated is determined, and the target value is set to a maximum value of the actual control variable in the electric brake when overshooting is generated. Therefore, the target value and the actual control variable will be in agreement with each other before hunting to be generated after overshooting starts. Accordingly, the output of the electric brake is gradually stabilizing at the target value without an oscillation phenomenon as in a related art.