Disclosed is a waste heat clamping control method, comprising the following steps: a. monitoring an instant temperature at a waste heat accumulation part of a target object; b. when the monitored instant temperature reaches or exceeds a set temperature, guiding the waste heat at the waste heat accumulation part out by means of unidirectional conduction; and c. converting the waste heat that has been guided out into other energy, other than heat energy, with the other energy being stored or being directly output. Further disclosed is a self-source waste heat temperature-clamping apparatus, the apparatus comprising at least one temperature-clamping unit. The temperature-clamping unit comprises a pre-temperature-clamping meter (1) and at least one thermoelectricity conversion unit (2), wherein the pre-temperature-clamping meter (1) comprises a passive-type temperature controller and a first heat-conduction-type heat-conducting path; and the thermoelectricity conversion unit (2) comprises a heat transmission device (22), configured to continue to unidirectionally conduct heat from the first heat-conducting path downstream. In addition, further disclosed is a vehicle comprising the self-source waste heat temperature-clamping apparatus. A method for cooling is to combine both the unidirectional heat conduction and the heat energy conversion. By taking advantage of the feature that the unidirectional heat conduction is irreversible, the restriction of the speed of heat conduction of the target object due to a counter current in a conducting path is avoided, and in particular, the restriction of the speed of heat conduction from the target object due to a counter-current flow of useless waste heat during the heat energy conversion is avoided, thus ensuring that heat can be guided out from the target object successfully; in addition, after storing or directly outputting other forms of energy obtained by means of heat energy conversion, equivalent to the heat on the target object being stored or acted on by a third spare part or apparatus by means of other forms of energy, i.e. by taking advantage of a feature that an energy source, during heat energy conversion, is the heat on the target object, the dependence on a power source during a refrigeration process is avoided, and counter current of the heat energy to the target object is then avoided by means of conversion and transfer of the forms of energy.