Since you've only gotten frame challenges as answers, I'll throw in my hat. This answer is kind of a frame challenge, too, but I hope to offer some useful guidance for you as well.
A child's emotions are valid (all emotions are valid, in that they are sensible under the circumstances), and as such, should be treated with respect (acknowledged as valid, not invalidating the child.) This doesn't mean you should just bear with it and do nothing. Part of parenting is teaching emotional regulation.
First, the frame challenge.
How to teach him not to take these things emotionally and how to make his to watch?
I am guessing that your child is a sensitive individual with a lot of empathy. I think that's wonderful; the world has too many people without sufficient empathy in it. Yes, it means more pain, but in the best case scenario, it also means a willingness to do something about the suffering of others. So to try to change his feelings is an invalidation of who he is right now. Personally, I would not try to make him watch things that cause him distress unless it could be channeled into something constructive for him.
I would start by making sure he has a very rich emotional vocabulary. Being "happy" or "sad" or "mad" isn't enough information for you or for him, because learning accurately about feelings is the first step to dealing with them appropriately.
It takes me long time for me to console him each time until his mind is satisfied with my positive words,he will be crying.I am concerned that I cannot be with him in all situations to understand that he is crying and consoling him because he will not share until we understand that he is crying. Also he will be crying with no sound.There are situations where he comes from school crying.Just I am trying for some alternative.
There's a lot here, but I'll propose a general approach: start by asking questions before trying to console him. Ask, and listen carefully to his answers. Ask, "Why are you crying?" When he answers, ask for details. "Why does that make you sad?" When he's given you all the information about the why's and wherefores that he can, you can start to problem solve.
Possibilities (feeling words are in italics):
"Are you afraid that this might happen to you?"
"Did you feel helpless seeing this happen to (whomever)?"
"Did you feel hopeless seeing this..." (Helpless is the feeling that you can't do anything to stop [it]; hopeless is feeling that things can't change.)
Choose the feeling(s), then deal with it alone. E.g. "Feeling helpless is hard, isn't it? Was (character) helpless? What could (character) have done? What can you do when you feel helpless? (Turn off the show/leave/ask for help/ask someone to stop/whatever fits the situation.)
This is a short answer compared to all the work this will take, but the key concept here is to teach resilience, an ability to work through and bounce back from a negative emotion/situation/message.
Teaching a child to be resilient is a lot of work, but it's a gift that will serve him well throughout his entire life. Good luck!
I'm an elder adult, I cry easily, and still have times of very strong reactions when I see things in film/television. I have delivered many human babies and a fair number of goat kidlings; I know a lot about dangerous deliveries, and had my share of difficult ones. When I saw the movie Man of Steel, there is a scene that depicts the baby Kal El in in the transverse position in his mother's uterus. I felt panicky, my heart began to race, and I had a nearly overwhelming urge to stand and yell, "TURN THE BABY!!!", because that's an instance where both mother and baby die. Luckily, through the miracle of unrealistic science fiction, the mother immediately delivers the baby without any problems. Phew!"