A self-powered sensing and transmitting device, comprising: a piezoelectric generator (1, 1', 1"); a carrying structure stacked with the piezoelectric generator (1, 1', 1"); characterized in that: an encapsulation support structure including an encapsulation portion and two supporting portions connected to two ends of the encapsulation portion, the encapsulation portion encapsulating the piezoelectric generator (1, 1', 1") and the carrying structure; wherein the encapsulation portion and the two supporting portions are integrally formed, and wherein the two supporting portions function like bridge piers supporting the encapsulation portion and allow the encapsulation portion in which the piezoelectric generator (1, 1', 1") and the carrying structure are encapsulated to vibrate under support of the supporting portions; and a fixed support structure for being correspondingly coupled with the two supporting portions and fixed on a flexible surface, wherein the fixed support structure includes two first mating components, and each of the two supporting portions includes a second mating component correspondingly and physically coupled with a respective first mating component in an embedded fashion. a piezoelectric generator (1, 1', 1"); a carrying structure stacked with the piezoelectric generator (1, 1', 1"); characterized in that: an encapsulation support structure including an encapsulation portion and two supporting portions connected to two ends of the encapsulation portion, the encapsulation portion encapsulating the piezoelectric generator (1, 1', 1") and the carrying structure; wherein the encapsulation portion and the two supporting portions are integrally formed, and wherein the two supporting portions function like bridge piers supporting the encapsulation portion and allow the encapsulation portion in which the piezoelectric generator (1, 1', 1") and the carrying structure are encapsulated to vibrate under support of the supporting portions; and a fixed support structure for being correspondingly coupled with the two supporting portions and fixed on a flexible surface, wherein the fixed support structure includes two first mating components, and each of the two supporting portions includes a second mating component correspondingly and physically coupled with a respective first mating component in an embedded fashion. an encapsulation support structure including an encapsulation portion and two supporting portions connected to two ends of the encapsulation portion, the encapsulation portion encapsulating the piezoelectric generator (1, 1', 1") and the carrying structure; wherein the encapsulation portion and the two supporting portions are integrally formed, and wherein the two supporting portions function like bridge piers supporting the encapsulation portion and allow the encapsulation portion in which the piezoelectric generator (1, 1', 1") and the carrying structure are encapsulated to vibrate under support of the supporting portions; and a fixed support structure for being correspondingly coupled with the two supporting portions and fixed on a flexible surface, wherein the fixed support structure includes two first mating components, and each of the two supporting portions includes a second mating component correspondingly and physically coupled with a respective first mating component in an embedded fashion.