The invention provides a dry transformer bladeless cooling fan with an intelligent frequency conversion function and an operation method thereof. The cooling fan comprises a bladeless fan, a frequency converter, an infrared temperature measuring sensor and a microcomputer control module, wherein the infrared temperature measuring sensor is used for performing non-contact temperature measurement on a dry transformer winding by emitting and receiving infrared ray and transmitting a temperature signal to the microcomputer control module; output of the microcomputer control module is connected with input of the frequency converter; the microcomputer control module is used for controlling output frequency of the frequency converter according to the temperature signal measured by the infrared temperature measuring sensor; output of a variable frequency controller is connected with a control input end of the bladeless fan. According to the cooling fan, the temperature of the dry transformer winding can be measured according to the infrared temperature measuring sensor, and the rotation frequency of the fan is adjusted, so the dry transformer winding can be effectively cooled and the energy can also be saved.