There is provided an integrated electro-
hydraulic brake system. The integrated electro-
hydraulic brake system include a power source unit including an accumulator configured to store a pressure of a predetermined level, a pump configured to suck oil from a reservoir and
discharge the oil to the accumulator in order to generate a pressure in the accumulator, and a motor configured to drive the pump; and an integrated
hydraulic control device including a
master cylinder having two hydraulic circuits and configured to generate a
hydraulic pressure, a reservoir connected above the
master cylinder and configured to store oil, an in-valve and an out-valve configured to control a pressure delivered from the accumulator to a
wheel cylinder installed in each wheel, a shut off valve configured to control a
fluid pressure delivered from the
master cylinder to the
wheel cylinder, a pedal simulator connected to the master cylinder and configured to provide a reaction force of a
brake pedal, and a
simulation valve installed in a rear end of the pedal simulator, wherein the power source unit is provided as a separate unit in order to isolate operating noises, and the integrated
hydraulic control device and the power source unit are connected by an external
pipe, and the out-valve is provided as a normally
open type-
solenoid valve that is used at low current ranges, normally maintains an open state in order to reduce
heat generation, but is closed when a close
signal is received, compared to a normally close type-
solenoid valve that normally maintains a close state.