Abstract: The source of data collection is from different information management systems based on the different fields. The diversity of data format brings the inconvenience for the unified data management. A visual data standardization conversion system is researched and designed for the harmonization and standardization of data acquisition data. The system uses selfcustomized data rules and can change the nonstandard source data into the standard target data via the establishment of data source and metadata mapping logic. The standardization of data conversion system has features of interoperable, fast and it can be applied to other areas of data collection work.

Key words: middle library, visual, data conversion, data standardization