NOVELTY - The device has a relay thermal conductor (102) thermal conductively coupled with a heating or cooling thermal body (101) at an end and an interface thermal conductor (103) at another end. The relay thermal conductor directly performs thermal energy conduction with thermal body (104) by particular intercrossed overlapping layer construction. The interface thermal conductor has higher specific heat capacity relative to the relay thermal conductor, and increased thermal conductivity coefficient and thermal emissivity than that of the thermal body relative to the thermal conductor.    USE - Thermal conduction device for inter-crossed structure used for heat absorption, dissipation, cooling of thermal conductive application device, machine casing, heat pipe structure, structure casing, semiconductor component and ventilation device, or the heat absorption, heat dissipation or thermal energy conduction of information device, audio device, image device, air conditioning device, electrical machine, engine, thermal energy plant, building, building structure device, battery and fuel cell, or heat dissipation of lamp and LED device, or heat dissipation or thermal energy conduction of electric heater, electric heating home appliance and cooking device, or heat absorption or thermal energy conduction of flame heating stove, cooking device, or heat absorption or dissipation of water tower, or thermal energy conduction in home appliance, industrial product, electronic product, electrical machine, mechanical device, power generation equipment, building, air conditioning device, industrial equipment and industrial manufacturing process (all claimed).    ADVANTAGE - The device includes structure layer provided in prestressed-clamping type combined structure to reduce volume, and a prestressed clearance to produce clamping or outwardly expanding prestressing force to ensure better thermal conducting contact and avoid loosening or deformation of the multi-layer structure material due to different thermal expansion coefficients.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a thermal conduction principle for inter-crossed structure.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a multi-layered structure that is partially cross-layered and combined to be thermal conductive composing structure.    Heating or cooling thermal body (101)    Relay thermal conductor (102)    Interface thermal conductor (103)    Thermal body (104)    Thermal conductive interlayer (110)