An adaptive vital-sign detection method includes (a) receiving statuses in a predetermined first period, the status being stationary, motion or leave； (b) detecting whether the first period is interfered according to a status percentage in the first period； (c) receiving statuses in a predetermined second period if the first period is detected as being interfered, the second period being different from the first period； (d) determining an optimized status as being stationary if the first period is detected as being not interfered； (e) determining the optimized status as being motion or leave according to dynamic change of the statuses in the second period； (f) receiving vital signs in a predetermined third period when the optimized status is determined as being stationary or motion； and (g) processing the vital signs in the third period to obtain corresponding vital signs of the optimized status.一種適應性生理資訊偵測方法，包含(a)接收預設第一期間的複數狀態，其中狀態可為靜止、移動或離開；(b)根據第一期間的狀態的比例，以偵測第一期間內是否受到環境的干擾；(c)如果偵測第一期間受到環境的干擾，則接收預設第二期間的複數狀態，其中第二期間異於第一期間；(d)如果偵測第一期間未受到環境的干擾，則決定優化的狀態為靜止；(e)根據第二期間的該些狀態的動態變化，以決定優化的狀態為移動或離開；(f)當決定的優化狀態為靜止或移動時，則接收預設第三期間的複數生理資訊；及(g)處理第三期間的該些生理資訊，以得到優化狀態的相應生理資訊。
