Topic: How can I get the DWG file is created by which template?

[guohq]

You'll select a template when you create a new dwg file. How can I get the DWG file is created by which template if the dwg file  exists?

[cadabyss]

You can only determine which template was used to create an existing drawing if the template contains a unique identifier stored inside it, such as a user variable, a dictionary entry, or whatever.  As installed, AutoCAD does not come with a unique identifiers in the templates.  You would have to create them first.