Please tell me about the difference between computer science and information technology? I don't clear that.

Answer 1

"While IT and CS degrees can lead to similar jobs, the differences between the two are quite pronounced. IT professionals should enjoy installing computer systems, using software and maintaining networks and databases, while computer scientists should enjoy mathematics and software design."
~http://www.computersciencedegreehub.com/faq/difference-information-technology-computer-science/

Answer 2

I.e. IT uses what CS creates.