The invention discloses a membership determination method and system for intelligent equipment service platform user classification, and provides a a fuzzy C-means clustering algorithm based on crossand cross algorithm (CSO-FCM). The method is suitable for complex multi-feature, multi-dimensional and non-linear problems, not only overcomes the defects of a traditional method, but also retains theability of the FCM to process uncertain information, and has the advantages of being simple and easy to implement and high in global convergence. According to the known FCM, by determining the membership degree of each sample to the clustering center, classification of the samples is achieved, the membership degree of the user attribute data of each user and the clustering center is calculated, and the accuracy and stability of determining the membership degree are improved.