A method for intrinsic shape functions of blood pulse is executed by a processor to perform the steps of: (A) obtaining an original blood pulse signal within a period of time (B) finding a trend feature of the original blood pulse signal according to a setting rule (C) dividing the trend feature from the original blood pulse signal to form a removal feature signal (D) replacing the original blood pulse signal using the removal feature signal (E) repeatedly executing steps (B) to (D) until reaching a predetermined time shorter than the period of time (F) outputting the L-th removal feature signal for use as a first processing signal, wherein L is positive integer and (G) dividing the first processing signal from the original blood signal to catch a first intrinsic shape function.一種血液脈波內生特徵分割方法藉由一處理器執行,該方法包括以下步驟:(A)取得一期間內的一原始血液脈波訊號;(B)依據一設定規則尋找該血液脈波訊號的一趨勢特徵;(C)從該血液脈波訊號中分割該特徵訊號,形成一去除特徵訊號;(D)以該去除特徵訊號取代該血液脈波訊號;(E)重複執行步驟(B)至(D)直至一預設時間,其中該預設時間小於/等於該期間;(F)輸出第L次分割後的訊號,並作為一第一處理訊號,其中L為正整數;以及(G)從該血液脈波訊號中分割掉該第一處理訊號,藉此取得一第一內生特徵。S21~S33‧‧‧步驟
