Is there a device or software that can connect a mobile phone card with a computer like QQ, and answer calls and send and receive text messages on the computer? Thank you!

You should be talking about wireless network cards. All notebooks have special sockets. Install the SIM card to the network card, and then insert the network card into the notebook computer. Install the special software for the network card or China Mobile can send short messages with E-line. The call depends on whether your network card supports it. I usually bring a headset to make a phone call. Internet cards can be bought in the technology market.