The invention discloses a grain temperature data visualization method and device, belonging to the field of computers. The technical problem to be solved by the invention is how to display the temperature condition of each corner in each layer of the grain pile. The overall condition of the grain pile is convenient to observe. According to the technical scheme, the method has the advantages that grain temperature is subjected to data processing, processed data is displayed in a layered and visualized mode through a visualized tool. Abstract data is processed into a visualized temperature fielddiagram, and analysis and daily monitoring are facilitated. The method comprises the following specific steps: S1, processing coordinates of a temperature measurement point through coordinate transformation; S2, obtaining the temperature of the grain between the adjacent temperature measurement points of the same layer through interpolation; and S3, displaying the grain temperature in a layered manner through the temperature field diagram. The device comprises a temperature measuring point coordinate conversion unit, an adjacent temperature measuring point interpolation processing unit and atemperature layered display unit.