EMB (Electro-Mechanical Brake) is an integrated brake module of CBS (Conventional brake system) and active brake (ABS, ESC, Value added) functions. EMB is consist of PMSM which generates braking torque and ball screw which is used to translate rotary motion from PMSM to axial motion of caliper cylinder. The development objective of EMB simulator model is validation of EMB braking control algorithms feasibility. EMB simulator enables to test vehicle braking performance according to properties of EMB HW in the MATLAB/Simulink environment. Therefore, A EMB simulator system is composed of vehicle model, EMB HW model and SW model. A vehicle model by using CarSim simulates the performance of vehicles in response to driver braking control. EMB HW model by using system identification is built by mathematical models from measure data. It is a simulation validated by comparing simulation results with vehicle test results.