A smart diaper, which may be disposed inside a diaper, and may include a sensing element and a wireless RF circuit. The wireless RF circuit may include a transmitter and a wake-up receiver. The wake-up receiver may receive a wake-up signal transmitted from a backend platform to wake up the transmitter. The sensing element may sense the environmental status inside the diaper to generate a sensing signal. The transmitter may receive the sensing signal, and then transmit the sensing signal to the backend platform.一種智慧尿褲感測器,其可設置於尿褲內,並可包含感測元件及無線射頻電路。無線射頻電路可包含發射器及喚醒接收器。喚醒接收器可接收後端平台傳送而來之喚醒訊號以喚醒發射器,感測元件可感測尿褲內之環境狀態以產生感測訊號,發射器則可接收感測訊號,並可將感測訊號傳送至後端平台。