The invention discloses a cross-system data conversion method for integrating power grid operating environments and device information. The conversion method includes the steps: unifying the power grid operating environments and device model specifications, and unifying association relationships and specification standards of business systems; performing initial data cleaning for source data of the business systems according to the operating environments and the device model specifications, and filtering date without meeting the specifications; calculating according to loads of different devices, determining load attributes, extracting characteristic content with high frequency by the aid of textual characteristics to construct new attributes, performing matching for different systems, and updating power grid operating environments according to matching results. According to the conversion method, unified power grid operating environments and device model specifications are built, and the conversion method provides reference basis for corresponding integration of business data systems of electric power industries.