hacker are always trying to take money from wallet. I am very worried about the security of my wallet. what are the best way to secure wallet so that my bitcoin will always safe and secured. help me to find me the ways.
The answer to your question lies in how you posed your question-- if you are worried about the hackers, then don't give them a chance to have an access to your stuff! What I'm saying is, you need to keep things OFFLINE, so that there is no way that any hacker can reach you.
Online wallets have their use though-- keep a small amount of your bitcoins online for your personal use. But be sure that this amount is something you can afford to lose.. because, you never can tell what can happen whenever you go online.
Btw, keeping an offline wallet is also called "cold storage" in the bitcoin community. You can find more info here:
https://en.bitcoin.it/wiki/Cold_storage