An ultrasound imaging system may include a probe, a transmitting circuit which may excite the probe to transmit ultrasound beams towards a scanning target in at least three ultrasound propagation directions a receiving circuit and a beamforming unit which may respectively receive the echoes of the ultrasound beams in the ultrasound propagation directions to obtain the echo signals in each of the ultrasound propagation directions a data processing unit which may obtain velocity vectors of target points in the scanning target using the echo signals in each of the ultrasound propagation directions and obtain ultrasound images of at least a portion of the scanning target using the echo signals and a display which may display the velocity vectors and the ultrasound images.
