Is it possible to integrate voice module and capacitive touch switch to arduino, both working at same time without any pc support or android support for home automation.
if yes then help me.
I think it depends on what kind of voice recognition performance you expect...
You might start by experimenting with the [u]Easy VR Shield[/u]. (I've never used it.)
Then, you'll have to figure-out how to interface with the rest of your home automation system... I assume you don't have an existing system? If not, I strongly suggest that you choose one of the existing protocols (X-10, Insteon, Z-Wave, etc.) and then buy your dimmers/switches. There are lots of engineering & construction challenges involved in building something that fits into a wall-switch box, works without re-wiring, and looks good, and in the end you probably can't build it for the price you can buy it.
P.S.
The voice recognition modules sold by [u]SmartHome[/u] are based on Alexa or Google. That means the actual voice recognition is being done by powerful severs on the Internet. And, I assume that means you can't get good voice recognition from a cheap little box. You probably don't need a computer but you do need an Internet connection. These things start at about $100 USD, and that's just the voice command module... It doesn't include the rest of the home automation system.
I think that by the time you manage to build working voice recognition into an arduino (16 MHz clock, 2 kB RAM), you're so good that adding the capacitive switch will become a no-brainer.