An ultrasonic blood flow parameter displaying method, comprises: acquiring, by means of a probe (1), an ultrasonic signal from an object to be scanned (S100)； acquiring, according to the ultrasonic signal, a plurality of velocities and directions of blood flow within the object to be scanned (S200)； extracting the plurality of velocities and directions of blood flow (S300)； quantifying the dispersion of the plurality of velocities and directions of the blood flow extracted (S400)； and displaying the quantization result of the dispersion (S500). The present invention provides a method for quantifying and evaluating the direction of the motion of blood flow, and provides a better perspective of observation for a user.
