The invention provides an electronic billing method, including: extracting data from the billing database; constructing XML DOM (document object model) with the said data; XML converter converts the data in the XML DOM to a specified output format under XSL format document and user parameters instruction. In the above method, the means of extracting data from the said billing database can be: batch extracting the said data before the user inquiries the said data, or real-time extracting the said data when the user inquiries the said data. Moreover, the procedure of constructing the data to XML DOM can include: generating the said data to the XML document; parsing the XML document, and obtaining document object model DOM.