In many books, I saw that they say Political Science is a science. But I can’t understand how can it be science? They show many reasons behind to say it’s a science, but none of them satisfied me. Can any one explain is it really science or not.

This is mainly just information gleaned from Wikipedia and encyclopedias:

Political Science is a branch of Social Science. Social Science is the study of humanity/human influences that uses the scientific method. They're considered a science because of that, although according to Wikipedia they're considered "Soft Science" while natural sciences like Geology are considered "Hard Science."

Yeah, I guess that makes sense. To me it doesn't really matter what they're called. I think political science has a great deal to do with psychology and other "social sciences," especially if you're a politician or whatever and are trying to get people to do what you want them to do.

i read somewhere where someone tried to say that any science which needed the word "science" on the end was not actually a science... but he was taking a stab at computer science, not political science. I guess political science is a science, but i dunno where a political science major gets a job at after college