Ho to learn Korean language in easy way i could?
Try progress by the best free online resource there is, by ttmik (Talk to me in Korean, www.talktomeinkorean.com ). They have really small and comprehensive lessons prepared on their web site. Once you have finished them, test yourself on duolingo. But be aware that it is still in beta.
Ah, plus: Learn the Korean alphabet first. You will be able to do so in less than two hours (even though you will not be fluent reading it in that time). If you are a really slow learner, give it 3 hours. And practice writing things (i.e., English names for things) in the Korean alphabet. Practice by use!