Ultrasound system and method for forming a plurality of 3 dimensional ultrasound images

The ultrasound system and a method of forming a 3D ultrasound image are provided. The system and method, and transmits the ultrasound signals to a target object and form a plurality of volume data by using a plurality of ultrasound data acquired for a plurality of ultrasound data, obtained by receiving ultrasound echo signals reflected from the target object, a number of formed of performing the rendering to at least one of the volume data from the volume data to form a plurality of three-dimensional ultrasound image. Ultrasonic volume data, rendering