After many times installation of Slackware. I've not been able to access network.

I used VM-ware, Slackware 13.37, no configure network so I have not had host, domain name.
And I used NAT to connect between virtual machine and real computer.

Thank you so much in advance!
P/S: There are many ways to install slackware, I just need a way which can access network.

I'm going to pretend you've given us enough information to actually help you.

Here's my version:
You're running Slackware 13.37 in a VM (VMware), on an unknown host OS, that has its own network connection that's working fine. Problem is, the Slack VM can't connect to the LAN or Internet. You have run "netconfig" as root from the command line, but that didn't help since you think you don't have a hostname or a domain name.

Answer:
Run netconfig again and just make up some names. Be sure to really carefully read through the words shown in netconfig. Be sure to select DHCP if you have a router on your LAN that serves DHCP. You might want to reboot the VM after that. If this doesn't help, change your VM's network settings from "NAT" to "Bridged" and try again. If all else fails, just install Slackware as your main host OS as nature intended.

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Thankkkkkk you very much!

I ran netconfig.
My host name: localhost
My domain name: google.com however I think that google.com is a alias(it's not real).