As the main obstacle to application integration is inadequate interoperability of itself， both the upgrade of common information model（CIM） version and different descriptive languages will result in the loss of interoperability. The interoperability levels of CIM data are analyzed， and based on metadata interoperability， an adaptive decoding and translation method applicable to any model description schema or text descriptive language is proposed. Furthermore， a SMARTCIM platform that can provide unified data I/O interface for multi-data sources and multi-application systems is designed， which is used as a decoupling and buffering platform between data and applications. The practicability and efficiency of the SMARTCIM are proved in the project of the integrated data platform in the Central Control Center of Jiangxi Extra-High Voltage Sub-company.