does memorizing master's games good???

We'll said. Corroborates my experience

Very interesting. What games do you thought might be the best to memorize? 

"A grandmaster needs to retain thousands of games in his head, for games are to him what the words of their mother tongue are to ordinary people, or notes or scores to musicians.."

Kasparov

IM David Pruess has a 6-part series on Youtube on how and why to memorize chess games.

https://www.youtube.com/watch?v=ibI-AHhLqqg

Yes and is kinda easy. I think a chess game is like a movie, as much you understand what is happening, will be easier to remember and to discuss about it with other people. You can't discuss about a game if you don't know what's happening, even when you remember all the moves. So, memorize a game is study chess. Worry about what's the point of every move, and what's the plan in general. Learn the opening theory for that game. You will improve a lot. I just have memorized one game in my life and I don't do all the job, I just go trough the PGN without looking the board and trying to play it in my head, then I go to the chess board and play it by myself. I was trying to see the board in my head, another exercise. To learn a game, just sat with a board in from of you and the pgn. Go 5 moves, try to analize what happen there, go 5 more moves, and so on. My first game was about 50 moves (100 individual moves), so is not that hard. It took me a night and I did it without the board, just imagine the board in my head. But I saw that games too many times before (it was a Fischer games) that I already knew what happen. Regards.

Correspondence players memorize the games they are playing. I used to play 50 correspondence games at once and could go through each game.

This was because there were reasons for every move made.

"... At 20-40 minutes per game you should be able to go through most game collection books in a reasonable amount of time. Going through games quickly and efficiently means you can read more annotated game collections and the more, the better. I played through about 30 in my first two years of serious play and it helped me greatly. ..." - Dan Heisman (2005)

https://web.archive.org/web/20140627023809/http://www.chesscafe.com/text/heisman50.pdf

"I couldn't replay any although I could recognise quite a lot." - CM JamesColeman (~4 months ago)
(After a little more thought, he identified three games that he could replay.)

any suggestion which i can learn 100% out of every game i studied???

Yes, have your brain transplanted with the brain of a Vulcan. 

I love this discussion. A shame no titled player contributed, but I'm willing to give it a go at some point!

Let nobody tell you nonsense. Memorizing games is a very good way to improve. And contrary to popular belief it is hard work. If you are not memorizing your games, it means you have forgotten your mistakes and will repeat them. The game of Chess is simple. If you have the answer you win. If you dont, you have to do calculate on the spot. By memorizing games and positions you build up your intuition and are able to skip through alot of muk when calculating. I currently have a hard hard time remember Chess openings lines, endgame positions and games I played. If I began remembering my Chess would be bolstered tremendously. If you cant remember Chess, you cant study opening lines and traps to get an advantage! You will always be alone at the Chess board.