An ultrasound imaging method includes steps of transmitting a plurality of ultrasound signals by a pulse repetition interval； receiving a plurality of reflected signals of the ultrasound signals； separating a blood flow signal and a clutter signal from the reflected signals by a neural network； calculating a blood flow parameter according to the blood flow signal； determining a blood vessel position according to the blood flow parameter； and adjusting an image signal corresponding to the reflected signals according to the blood flow parameter and the blood vessel position to generate an ultrasound image.
