Hi Wang_Xin,
I am not 100% sure your wireless card will work with Galileo, since you have the driver lets give it a try. Take a look at this blog by Sergey, Intel Galileo Meets Wireless. He provides step by step on how to install the driver. You will need a USB to 3.5 mm stereo plug, you can buy a USB to RS232 and RS232 to 3.5 mm adapters or build one following his instructions here: Intel Galileo - Introduction - Malinov Family Web Presence.
By the way, I tried example "WiFiWebClient" error message "WiFi shield not present"
Intel Galileo does not use the Wi-Fi shield instead it uses the mini PCI-E port, the error appears because the driver for your wireless card is not properly installed or the wireless card is not being detected at all. Once you follow the steps to properly install the driver and the card is being detected correctly. You will be able to run these sketches without the error. If the card does not work properly on Galileo i would recommend getting a Intel Centrino Wireless N-135 since the driver is already installed on Galileo.
Regards,
Intel_Jesus
