Do i need to use there faucet script.
what is best free faucet script,and why?
You don't want to use anybody's faucet script. Just request an API and integrate it to your faucet.
AFAIK there is nothing like a best faucet script. MicroPayment services mostly create it for easy-faucet-creating, so everybody can create it.
P.S. Just found that Paytoshi's faucet script has a few pre-loaded themes which can be changed from admin panel.
good suggest, thank you but that high fee
It's not high. For example, if you deposit 0.01
BTC in FaucetBox, your account will be credited 0.0097
BTC. Anyway, if the fee is the problem you can use Paytoshi and if they charge fees later(most probably they will
[1]), you can stay with them if the fee is lower or migrate to FaucetBox.

[1] They just launched it. So now it may be free but if they get many owners, they may charge fee.
~~MZ~~