Provided is an ultrasound diagnosis apparatus configured to automatically search a cross-section including a desired feature of an object. The ultrasound diagnosis apparatus includes: a display； a memory storing one or more instructions； and at least one processor configured to execute the stored one or more instructions to: acquire three-dimensional (3D) ultrasound volume data regarding a region of interest of an object； identify a plurality of two-dimensional (2D) cross-sections, each including at least one feature to be observed, based on the 3D ultrasound volume data； determine priority levels of the plurality of 2D cross-sections based on the at least one feature included in each of the plurality of 2D cross-sections； and control the display to display a plurality of 2D ultrasound images respectively corresponding to at least some of the plurality of 2D cross-sections based on the priority levels.
