Provided are a three-dimensional (3D) ultrasound system and a method for operating the 3D ultrasound system. The 3D ultrasound system may include a display unit to form an image with respect to an object in the body and to display the image on a screen, and a control unit to generate a figure template corresponding to the image, to adjust the generated figure template based on a reference location of the image, and to superimpose the adjusted figure template on the image and display the resulting combination.