Webpage data extraction device and webpage data extraction method thereof

A webpage data extraction method for a webpage data extraction device, the webpage data extraction device receives a plurality of webpage data from a webpage server, the webpage data extraction method comprising:

• (a) the webpage data extraction device grouping the webpage data into at least one Uniform Resource Locator (URL) group according to address relations of a plurality of URLs of the webpage data, wherein the at least one URL group includes a first URL group, and the first URL group comprises at least a part of the webpage data;
• (b) the webpage data extraction device selecting a first webpage data and a second webpage data from the part of the webpage data of the first URL group;
• (c) the webpage data extraction device analyzing the first webpage data and the second webpage data to derive a webpage node data set, wherein the webpage node data set comprises a plurality of webpage node data, each of which comprises a corresponding XML Path Language and a corresponding text content;
• (d) the webpage data extraction device grouping the webpage node data of the webpage node data set into a plurality of webpage node data groups according to path relations of the XML Path Languages of the webpage node data of the webpage node data set and text relations of the text contents, wherein each of the webpage node data groups at least comprises a part of the webpage node data;
• (e) the webpage data extraction device calculating a text content sum of the part of the webpage node data of each of the webpage node data groups respectively;
• (f) the webpage data extraction device determining at least one main webpage node data group from among the webpage node data groups according to the text content sums;
• and
• (g) the webpage data extraction device deciding webpage main content extraction information according to the XML Path Languages of the part of the webpage node data comprised in the at least one main webpage node data group.