how detect google smart bot?

Is there way to detect smart google bot site checker?
Found that google using different Ips that are not in their anonsed networks. Also such smart bots has filled user-agent, language and others headers parameters. Think that it used own botnet via GTB. Only one way that i can detect it - is walking on more than 3 doorways and referer from google search with marked previous search keyword that is not related to my content

I am not sure I understand you English completely but the 'general' answer to detecting Google bots is to use a good IP server and cloaking tool... doesn't have to be mine -- it could be IPGrabber or any of the others.