The utility model discloses a converter, which consists of a constant current source, a resistance network, an operational amplifier and a cable and is arranged between a temperature probe and a measuring and control device. The operational amplifier is used for forming positive phase and reverse phase (addition and subtraction) circuits, errors caused by the cable resistance along with the length are mutually counteracted to reach a self-adaptive goal. When being adopted, the self-adaptive temperature converter has the advantages that the compensation can not be carried out according to the length of the cable, the installation near a transformer is not needed, the use of a single power supply is not needed, the structure is simple, the performance is reliable, the safety is good, the installation is convenient, the cost is low, and the like.