A non-contact vital-sign monitoring system having a radar disposed in vicinity of a monitored subject includes a data buffer storing output signals of the radar sampled in sequence during a predetermined period； a status classifier determining status of the monitored subject； and a vital-sign detector determining a vital sign of the monitored subject according to the output signals of stationary status.一種非接觸式生命徵象偵測系統，其具有設於待測者附近的雷達，該非接觸式生命徵象偵測系統包含資料緩衝器，儲存預設期間內依序取樣的雷達的複數輸出信號；狀態分類器，根據該些輸出信號以決定待測者的狀態；及生命徵象偵測器，當待測者為靜止狀態時，根據該些輸出信號以得到待測者的生命徵象。
