Data center thermal environment evaluation method and device

The technical problem to be solved by the invention is a data center thermal environment real-time online evaluation and evaluation means and method, and the method comprises the steps: arranging an optical fiber temperature sensor at an air inlet or an air outlet of a cabinet of a data center, and obtaining the temperature of a corresponding measurement point; according to the thermotechnical environment evaluation indexes, the air supply temperature and the air return temperature of a cabinet air conditioning system of the data center are calculated and need to be obtained; setting the highest allowable temperature, the highest recommended temperature, the lowest recommended temperature and the lowest allowable temperature of the data center rack; calculating to obtain evaluation indexes of the thermal environment of the data center by utilizing the temperature, wherein the evaluation indexes comprise at least one of a rack cooling index (RCI), a return air temperature index (RTI), a heat supply index (SHI)