I am graduate engineer in computer systems without much experience regarding my field. how can I get job my field related to gain relevent experience?

Hi Faisal 

i think professional certification will be very helpful...

check out this website 

http://www.tomsitpro.com/articles/best-it-certifications,1-.html

just choose you path.

It is very hard to find one you have to struggle a lot. My suggestion to you is to find any job to get settled if you are in UAE or else if you are in your home country you should find relative one and yes you can find it in your country very easily that's the best option for you.