The invention provides an intelligent transformer station energy efficiency detection method based on a WSN, and the method comprises the steps: S1) determining energy consumption calculation information parameters of a main transformer, a station transformer, an electric reactor, a capacitor and other intelligent equipment in the intelligent transformer station, and installing corresponding wireless sensors on the corresponding equipment according to the parameters; S2) enabling the wireless sensors to form a wireless sensor network, and enabling the wireless sensor network to be in wireless connection with an energy efficiency monitoring platform; S3) collecting the data of all wireless sensors; S4) carrying out the on-line collection of energy consumption parameters of all equipment of the intelligent transformer station; S5) carrying out the on-site detection of the energy consumption of the intelligent transformer station. The method can achieve the full-scene on-site detection of the energy consumption of the novel intelligent transformer station, and the detection data are uploaded to an energy consumption detection platform through the WSN. The method achieves the analysis and evaluation of the energy consumption data, and achieves the on-line analysis of the operation energy efficiency of the intelligent transformer station.