There are provided embodiments for providing a motion mode image corresponding to a motion of a target object. In one embodiment, by way of non-limiting example, an ultrasound system comprises: a user input unit configured to receive input information for setting a region of interest on a brightness mode image； and a processing unit configured to form the brightness mode image based on first ultrasound data corresponding to a target object and form vector information of the target object based on second ultrasound data corresponding to the target object, the processing unit being further configured to form a motion mode image including at least one of a brightness motion mode image and a color motion mode image based on the first ultrasound data and the vector information corresponding to the region of interest.
