Can I control PAT-T series with Excel VBA or LabVIEW without any option by free?

Yes, as long as you use the RS232C interface, which is the standard interface of PAT-T series.
You can also download the KI-VISA library by free from our website > Drivers > Common Library.
For the USB, LAN or GPIB interface, the optional interface board is required (not free of charge).