The invention relates to a vacuum heat collector, which mainly comprises a vacuum cavity and a heat transfer unit, wherein the vacuum cavity comprises a cavity wall and a plurality of temperature conducting particles, the cavity wall defines a chamber, the temperature conducting particles are suspended in the chamber, the temperature conducting particles can generate vibration after being heated, are mutually collided and can release the heat energy, the heat transfer unit comprises at least one temperature superconducting pipe, and the temperature superconducting pipe connects the vacuum cavity and a heat source, and is used for conducting the heat energy generated by the heat source to the vacuum cavity. Thereby, the invention can release the heat energy through the vacuum cavity, and the vacuum cavity can compensate the consumption in the heat energy transfer process, and can effectively improve the heat efficiency, so the invention has high practicability.