A disposable diaper condition detecting device includes a disposable diaper, an induction device (01 56) and an alarming device (20 60). The disposable diaper includes an outer layer (15 80), an interlayer (16) and an inner layer (17). The induction device (01 56) is provided on the outer layer (15 80) or provided between the outer layer (15 80) and the inner layer (17) of the disposable diaper. The induction device (01 56) is used to detect the urine-wetness condition of the disposable diaper and to produce the urine-wetness condition induction signal. The alarming device (20 60) may be integrated with the induction device (01 56), or may be combined with the induction device (O1 56) or may be separated from the induction device (01 56). A disposable diaper condition monitoring system includes a disposable diaper condition detecting device and a disposable diaper condition displaying device (02). The disposable diaper condition display device (02) is used to display the disposable diaper condition information based on the urine-wetness condition signal or the urine-wetness alarming signal transmitted from the disposable diaper condition detecting device.
