The paper introduces the concept of "twisted thermotics," a novel field that explores the manipulation of heat diffusion in twisted systems, inspired by the magic angle phenomenon in twistronics and opto-twistronics. The authors demonstrate that by carefully tailoring the thermal coupling in a twisted diffusion system, they can achieve a thermal magic angle, which results in a switchable effect from cloaking to concentration. This work provides insights into tunable heat diffusion control and opens up new avenues for thermal management applications, including thermal cloak, thermal concentration, and thermal rotation. The theoretical framework and experimental validation of this concept are detailed, showing that the width and radius of the stripes in the twisted bilayer system can be used to control the thermal conductivity tensor, leading to the emergence of a thermal magic angle. The findings have potential implications for various scientific disciplines, including fluid manipulation and biophysics, and pave the way for advanced thermal metadevices.The paper introduces the concept of "twisted thermotics," a novel field that explores the manipulation of heat diffusion in twisted systems, inspired by the magic angle phenomenon in twistronics and opto-twistronics. The authors demonstrate that by carefully tailoring the thermal coupling in a twisted diffusion system, they can achieve a thermal magic angle, which results in a switchable effect from cloaking to concentration. This work provides insights into tunable heat diffusion control and opens up new avenues for thermal management applications, including thermal cloak, thermal concentration, and thermal rotation. The theoretical framework and experimental validation of this concept are detailed, showing that the width and radius of the stripes in the twisted bilayer system can be used to control the thermal conductivity tensor, leading to the emergence of a thermal magic angle. The findings have potential implications for various scientific disciplines, including fluid manipulation and biophysics, and pave the way for advanced thermal metadevices.