Want to have a internet shop in thailand with online visa/mastercard payment. Can you recomend some?

Do you mean you want to have an online ordering system with payment options, or do want to make an internet shop with computers for people to use and pay by credit card?

There are several threads on these subjects in this part of the forum that have information on the viability of both.

Internet based business threads, Sorry I did not read them to see if relevant;

http://www.thaivisa.com/forum/index.php?showtopic=186125

http://www.thaivisa.com/forum/index.php?showtopic=174868

http://www.thaivisa.com/forum/index.php?showtopic=147393

If you check out the last few pages of this sub-forum and the main business forum you will find may threads on the information you need.

Remember research is good, the help of a real lawyer and accountant is usually worth the money for the saving of aggravation. There are a number of these recommended in the relevant threads.