Thank you for your reply!
My LAN have a router, a switch, and FreeNAS BOX connected to the switch. FreeNAS-9.2.1.7-RELEASE-x64 (Fresh installation) .
LAN IP: 192.168.1.10
Lastnight, I try to "ping freenas.local" use windows 7 clinet, It's showed the public IP of my network rather than LAN IP.
But when I use MAC AIR "ping freenas.local", the results are correct.
I will try to access the "freenas.local" with browser later.