Abstract: Based on Visual Basic 6.0, according to the related regulations and calculation methods of DL/T 651—1998《Requirements for Hydrogen Humidity of Generators Using Hydrogen as a Coolant》，quoting some application software such as Microsoft Office Access, Microsoft Excel，the generator hydrogen data management system was developed. The problem of converting the hydrogen humidity of generator by Lookup table only is resolved, and standardization and routinization of hydrogen data storage was realized. This system was applied in Hunan Huadian Changsha Power Generation Corporation Limited successfully, the calculation and management of hydrogen data was rapider, more convenient and more normative due to application of this system.

Key words: Visual Basic, generator, hydrogen, humidity, data management