This review discusses the development and challenges of high-temperature operatable triboelectric nanogenerators (HTO-TENGs). TENGs are devices that convert mechanical energy into electricity through the coupling of contact electrification (CE) and electrostatic induction. They are promising for self-powered wearable electronics and energy generation in extreme environments. However, high temperatures can reduce TENG performance by affecting electron storage, charge transfer, and material stability. The review highlights the importance of structural durability and electrical output stability in TENGs for challenging environments. The review provides a comprehensive overview of current research on HTO-TENGs, including recent advances in device structure design, polymer-based tribo-materials, gel-based TENGs, carbon-based TENGs, and metal-organic framework (MOF)-based TENGs. It also explores future research prospects and design strategies to enhance the performance of HTO-TENGs. The review emphasizes the role of thermionic emission in CE and the need to suppress this effect to maintain stable output at high temperatures. It also discusses the impact of material properties on TENG performance and the importance of developing flame-retardant and heat-resistant tribo-materials. Recent studies have developed various HTO-TENGs, including rotating self-standing mode TENGs (R-TENGs), ionogel-based TENGs (I-TENGs), and all-yarn-based TENGs (Y-TENGs). These devices have demonstrated high output performance at elevated temperatures, with some operating up to 673 K. The review also highlights the development of polymer composite tribo-materials, such as fluorinated polyimide (F-PI) films and poly(aryl ether ester) (LCP_AEE) materials, which exhibit excellent thermal stability and charge storage capacity. Additionally, the review discusses the use of phase change materials (PCMs) to mitigate the thermal effects of tribo-materials and maintain stable electrical output in high-temperature environments. The review concludes that HTO-TENGs have significant potential for applications in extreme environments, including aerospace, automotive, and industrial settings. Future research should focus on improving the durability, stability, and efficiency of HTO-TENGs, as well as expanding their application fields. The review provides insights into the current state of HTO-TENG research and offers recommendations for future development in this area.This review discusses the development and challenges of high-temperature operatable triboelectric nanogenerators (HTO-TENGs). TENGs are devices that convert mechanical energy into electricity through the coupling of contact electrification (CE) and electrostatic induction. They are promising for self-powered wearable electronics and energy generation in extreme environments. However, high temperatures can reduce TENG performance by affecting electron storage, charge transfer, and material stability. The review highlights the importance of structural durability and electrical output stability in TENGs for challenging environments. The review provides a comprehensive overview of current research on HTO-TENGs, including recent advances in device structure design, polymer-based tribo-materials, gel-based TENGs, carbon-based TENGs, and metal-organic framework (MOF)-based TENGs. It also explores future research prospects and design strategies to enhance the performance of HTO-TENGs. The review emphasizes the role of thermionic emission in CE and the need to suppress this effect to maintain stable output at high temperatures. It also discusses the impact of material properties on TENG performance and the importance of developing flame-retardant and heat-resistant tribo-materials. Recent studies have developed various HTO-TENGs, including rotating self-standing mode TENGs (R-TENGs), ionogel-based TENGs (I-TENGs), and all-yarn-based TENGs (Y-TENGs). These devices have demonstrated high output performance at elevated temperatures, with some operating up to 673 K. The review also highlights the development of polymer composite tribo-materials, such as fluorinated polyimide (F-PI) films and poly(aryl ether ester) (LCP_AEE) materials, which exhibit excellent thermal stability and charge storage capacity. Additionally, the review discusses the use of phase change materials (PCMs) to mitigate the thermal effects of tribo-materials and maintain stable electrical output in high-temperature environments. The review concludes that HTO-TENGs have significant potential for applications in extreme environments, including aerospace, automotive, and industrial settings. Future research should focus on improving the durability, stability, and efficiency of HTO-TENGs, as well as expanding their application fields. The review provides insights into the current state of HTO-TENG research and offers recommendations for future development in this area.