Color Doppler ultrasonography is not as simple as replacing black-and-white ultrasound instruments with color ultrasound instruments, as ordinary people think. It has the advantages of higher resolution of lesions in tissues and organs than ordinary ultrasound, and can display smaller lesions in tissues and organs more clearly, but more importantly, it applies color Doppler ultrasound technologies such as pulsed Doppler technology, continuous wave Doppler technology, high pulse repetition frequency Doppler, color Doppler flow imaging, power type color flow imaging, and tissue Doppler imaging during the examination process to observe the changes in blood flow velocity, blood flow status and tissue echo of the examined tissues and organs in different cycle time phases. After combining this information with the relevant black and white ultrasound two-dimensional anatomical structure information, we can determine whether the examined tissues and organs have lesions, the degree of lesions and the nature of lesions. For example, in addition to the two-dimensional anatomical information obtained by black and white ultrasound, color Doppler flow imaging can be applied to the kidney to understand the filling distribution of renal artery, main renal artery, segmental artery, interlobular artery and arch artery in the kidney. If there is a significant reduction or even disappearance of blood flow filling in one kidney or the whole kidney during the examination, then it can be determined that the kidney artery embolism has occurred in that side of the kidney, and the color Doppler technique can be used to determine which renal artery is embolized, and even the extent of the embolism and the site of the embolism, so as to guide the clinic to take correct and effective treatment plans and measures. In contrast, ordinary black and white ultrasound examination can only obtain two-dimensional anatomical information such as whether the size of the kidney is normal, whether there is effusion, whether there are occupying lesions, stones and whether the thickness of the renal cortex is normal, but it is impossible to detect thrombosis in the renal artery, so that the diagnosis is missed, which eventually leads to local or whole kidney necrosis due to prolonged ischemia and delays the treatment of the patient. Another example is trophoblastic lobe disease – staphyloma. Color Doppler ultrasound can apply color Doppler flow imaging and color Doppler technology to determine the invasion and degree of invasion of the myometrium of the uterine body by understanding whether there is an abnormal increase in the distribution of local color blood flow between the myometrium in patients with staphyloma after uterine clearance, whether arteriovenous leaks are formed and the level of blood flow resistance index. If the local colored blood flow is abnormally abundant in the myometrial wall of the uterus after uterine debridement in patients with staphyloma, it means that the local erosion of the myometrial wall by the staphyloma has not been cleared and the patient’s uterus needs to be debridement. If a patient with staphyloma has multiple abnormal color flow images in the myometrial wall after uterine curettage, and the blood flow spectrum confirms that the blood flow is arteriovenous leakage with low resistance index, it indicates that the local encroachment on the myometrial wall is serious, or even transformed from benign to malignant staphyloma, which requires multiple scrapings and chemotherapeutic drug treatment, or even hysterectomy if necessary, to achieve cure. The goal is to cure. On the contrary, in patients with staphyloma, there is no obvious abnormal blood flow between the muscle walls of the uterus after curettage, which means that the curettage is complete and the purpose of the curettage is achieved, and there is no need to cure the uterus again. In contrast, ordinary black-and-white ultrasonography can only obtain two-dimensional anatomical information such as the size of the uterus, whether the morphology is normal, whether there are occupying lesions, and whether the local echogenicity is uniform, but cannot obtain clear color Doppler disease information such as whether the color blood flow distribution is abnormally increased and whether arteriovenous leakage is formed, so it cannot guide the clinical determination of the treatment and prognosis of patients with staphyloma. In conclusion, it has been proved through years of clinical practice that color Doppler ultrasonography can provide clinicians with more detailed and accurate disease data and information than black and white ultrasonography, which is very important for clinical treatment, monitoring, organ function evaluation and patient prognosis assessment. In addition, color Doppler ultrasound examination of the use of equipment personnel requirements are also high, in addition to having the qualification of a licensed physician, to obtain a license to practice medicine and black and white ultrasound diagnostic work for several years, but also to receive special training, and CT, MR and other diagnostic personnel requirements, to participate in the annual national examination, to obtain color Doppler ultrasound large medical equipment induction certificate, before having color Doppler ultrasound examination and diagnosis of the work of the qualification. Therefore, it is best for patients to choose to do color Doppler ultrasound when they have the conditions, so that they can obtain more valuable diagnostic results and lay the foundation for clinicians to make the correct diagnosis of the disease and develop the best treatment plan or surgical plan, which is conducive to the treatment, surgery and rehabilitation of the patients themselves.