Can anybody tell me how one can accompish Phd while at work. My subject is what I do for work. I dont want to attend classes. I am masters. And want to work as well as accomplish my Phd.

You can look for a suitable supervisor in your research area and discuss a part-time PhD. If your employers are supportive, you can arrange part-time or flexi-time work. They may also help with funding/fees. Most importantly if you're determined and have a good academic background, then this should be in your favour.