The present invention provides a method for storing an ultrasonic scan image and an ultrasonic device. The ultrasonic device may include: an image acquiring unit configured to scan a target object to obtain an image； a buffer unit configured to store the obtained image； a processing unit configured to compute a similarity of a frame of the image； and a storage unit, wherein when it is determined that the computed similarity of the frame is less than a threshold, the processing unit stores frames with a similarity equal to or greater than the threshold previous to the frame in the storage unit. Therefore, the image may be stored automatically based upon the similarity information of the frame of the ultrasonic scanning image.
