The present invention detects an unauthorized person's intrusion into a building, etc., and detects the presence of an outside intruder by quickly turning on or flashing a warning light and various alarm sounds (alarm message or siren). It is to provide a detection and alarm device.;That is, the present invention is a detector (2) having a detection function and a detection signal transmission function for detecting an intruder invading through an entrance or the like, such as a building, and a receiver for wirelessly receiving a detection signal transmitted from the detector (2) (3) and a relay switch (4) for receiving the signal from the receiver (3) and outputting the alarm message stored in the memory chip (6) of the alarm means (5) in advance through the speaker (10); The alarm means (5) is provided with a warning light (7) that can be notified of the intrusion by the light at the same time to selectively notify whether the intrusion by the alarm signal output from the memory chip (6) or the warning light (7). According to the present invention, the present invention can significantly contribute to building expenses and the like, and transmits a detection signal by wireless transmission, which can eliminate the harmful effects of the wired method, and can be supplied at low cost due to its simple configuration. The effect will be to offer.
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