The invention discloses a micro/nanopore material high-temperature heat transfer measuring device and a high-temperature heat transfer experiment method, and relates to a micro/nanopore material high-temperature heat transfer experiment method. The problems that an existing micro/nanopore material experiment measuring system cannot provide superhigh temperature heating, cannot change the atmosphere pressure and is simple in heating mode and collected signals are single are solved. According to the micro/nanopore material high-temperature heat transfer measuring device, high-temperature coupling heat transfer characterized data of micro/nanopore materials under different pressure environments can be obtained, a to-be-tested piece is fixed to a sealed cabin, air inside the sealed cabin is extracted out, protective gas is introduced, an air supply device, a pressure sensor and an air extraction device are controlled, and gas inside the sealed cabin can reach the expected pressure and is in the dynamic balanced state; according to a steady state experiment, a transient state experiment, a phase step radiation experiment and a periodic radiation experiment, a heating period control device controls the opening and closing state of a thermal baffle, and a data collection device collects experimental data. The micro/nanopore material high-temperature heat transfer measuring device is used for researching coupling heat transfer characteristics of the micro/nanopore materials.