A kind of detection method of Noninvasive thyroid tumors of what is closed in system of the present invention, wherein scanning thyroid tumors using the difference and all general principle for strangling effect of ultrasonic sound impedance to carry out pathological classification assessment. The present invention proposes that ultrasonic scans thyroid tumors quantization New Set and has the Statistics learnt automatically, the System program foundation as assessment malignant tumour. System of the present invention is using what thyroid tumors pathology assessment and initial stage screening.本發明係關於一種非侵入性甲狀腺腫瘤之檢測方法,其中利用超音波聲波阻抗的差異與都普勒效應的原理,掃瞄甲狀腺腫瘤以進行病理分類評估。本發明提出超音波掃瞄甲狀腺腫瘤量化新指標、與具有自動學習的統計原理,作為評估惡性腫瘤的專家系統程序依據。本發明係應用於甲狀腺腫瘤病理評估與初期篩檢。