The invention provides an electrical equipment energy efficiency chaos analysis method based on massive measurement data, belonging to the technical field of electrical engineering, particularly relating to an electrical equipment energy efficiency chaos analysis method based on massive measurement data. The invention provides the electrical equipment energy efficiency chaos analysis method based on massive measurement data, an advanced measurement data analysis method and a test detection system are combined, the association relation between the use condition of user electrical equipment and user power consumption data is analyzed, thus the power consumption habit of a user and the load characteristic relations of different electrical equipment are obtained. The method comprises the steps of (1) using the membership degree for a fuzzy C-means clustering (FCM) to determine that the integrated load characteristic of the user belongs to which degree of clustering, dividing n industry users xi (i=1,2,,,n) into c fuzzy classes, and obtaining the clustering center of each class such that a class inner weighted error square sum function is minimized.