The invention discloses an equipment early-warning method and an equipment early-warning system based on temperature measurement and a seasonal temperature difference. The equipment early-warning method comprises the steps of acquiring an equipment temperature directly-measured value of a specific area at a current time point and using the equipment temperature directly-measured value as an absolute temperature value Tdevice of a device, and simultaneously acquiring a predicated temperature value Tair at the current time point; calculating a difference between the Tdevice and the Tair, and obtaining a relatively temperature increase value detalT of the device at the current time point; respectively comparing the Tdevice and the deltaT with a preset absolute temperature threshold Tdevice(th) and a preset relative temperature increase threshold deltaTth, and if a random one in the Tdevice and the deltaT exceeds a corresponding threshold, performing early warning, wherein the time point is a minute time point or an hour time point.