The invention relates to a three-remote data processing method and device for transformation of a transformer substation and a computer device. The method comprises the steps of searching a three-remote database based on power station information of a to-be-checked and accepted transformer substation to obtain target three-remote data corresponding to the to-be-checked and accepted transformer substation; wherein the transformer substation information comprises a transformer substation voltage level, a transformer substation name, an equipment voltage level and an equipment name; wherein the three-remote database comprises three-remote data of each transformer substation; converting the target three-remote data into a target three-remote file according to a preset file format; storing thetarget three-remote file to a target path. According to the three-remote data processing method for transformation of a transformer substation, the target three-remote data of the transformer substation to be checked and accepted can be quickly selected from the three-remote database, and the target three-remote data is converted into a target three-remote file and the target three-remote file isstored in a target path, thereby improving the three-remote data processing efficiency and further saving the time cost of checking and accepting the transformer substation by related workers.