Embodiments of an ultrasound system for detecting a posture of a user and providing an optimal ultrasound image for the posture of the user are disclosed. The ultrasound system includes a display unit including a sensing unit installed in one side of a monitor. The sensing unit detects a position of a user, a distance between the user and the monitor, a height of the user with respect to the monitor and a viewing angle of the user toward the monitor to thereby form and output sensing signals corresponding thereto. The ultrasound system further includes a processing unit coupled to the sensing unit. The processing unit forms the ultrasound image by using ultrasound data and performs optimal image processing for the posture of the user upon the ultrasound image based on the sensing signals.