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Development of metadata theories and their application techniques provide a solution to mass data sharing in internet. This paper researched the key application techniques for multi-CMSs(content management systems) data based on metadata. Among several CMSs, each CMS has its own metadata standard, which includes an identifier to mark the data. To overcome the problem of data redundancy, we propose a metadata management scheme which can generate the unique and uniform metadata identifier in several CMSs so that we can manage multi-CMSs data reasonably and efficiently. We have applied this scheme on practical project, the result proved it's very suitable and has wide perspective in internet data management.