Doppler frequency spectrogram generating method and device

The invention provides a Doppler frequency spectrogram generating method and device. The Doppler frequency spectrogram generating method comprises the steps of obtaining M-wave characteristic data, identifying blood flow data in the M-wave characteristic data, determining the depth corresponding to a Doppler frequency spectrogram according to the blood flow data and generating the Doppler frequency spectrogram based on the determined depth. The Doppler frequency spectrogram generating method and device can automatically generate the ideal Doppler frequency spectrogram without intervention from a user, the working intensity of the user is greatly reduced, and the working efficiency is improved.