Abstract: A method and system for recognizing environmental protection equipment based on a deep hierarchical fuzzy algorithm. The method includes the following steps: (1) acquiring harmonic signal data of the environmental protection equipment by harmonic detectors, and acquiring type information of corresponding environmental protection equipment on site for constructing a training sample database; (2) extracting a feature vector of the data in the training sample database by a local mean decomposition method, and training, by using the training sample database, a deep hierarchical fuzzy system constructed on the basis of a least square method, so as to construct a recognition model; and (3) evaluating the inputted harmonic signal data by using the recognition model to determine whether inspected equipment is the corresponding environmental protection equipment.