Abstract: Non-contact sensing technology serves as a pivotal medium for seamless data acquisition and intelligent perception in the era of the Internet of Things (IoT), bringing innovative interactive experiences to wearable human-machine interaction perception networks. However, the pervasive limitations of current non-contact sensing devices posed by harsh environmental conditions hinder the precision and stability of signals. In this study, the triboelectric nanopaper prepared by a phase-directed assembly strategy is presented, which possesses low charge transfer mobility (1618 cm2V-1s-1) and exceptional high-temperature stability. Wearable self-powered non-contact sensors constructed from triboelectric nanopaper operate stably under high temperatures (200 °C). Furthermore, a temperature warning system for workers in hazardous environments is demonstrated, capable of non-intrusively identifying harmful thermal stimuli and detecting motion status. This research not only establishes a technological foundation for accurate and stable non-contact sensing under high temperatures but also promotes the sustainable intelligent development of wearable IoT devices under extreme environments.