Disclosed is an apparatus of determining a scan image of a three-dimensional ultrasound diagnostic apparatus, including: a scanning unit configured to generate two-dimensional volume images of an inside of a human body using an ultrasonic signal a processing unit configured to combine the two-dimensional volume images acquired through the scanning unit to generate a three-dimensional volume image and determine whether the three-dimensional volume image is normal a database configured to store the three-dimensional volume image generated by the processing unit and an alarm sound output unit configured to, when data determined by the processing unit is not normal, provide notice thereof using any one or more of an alarm sound, an alarm light, and an alarm message.
