When I'm entering into bios setting then it is asking pass word what I should do can any help me

About the only things you can do are this:
1. Try REALLY hard to remember the password. Trying 'password' is always good.
2. Take the case apart, find a BIOS or CMOS Clear jumper on the motherboard, and connect it for a few minutes. If you've got a manual for the motherboard, that should be able to tell you where it is, or you can just search for it.
3. Take the case apart, find the battery on the motherboard, and take it out for 10 minutes or so.