Need to change my security questions

I Need to change my security question

Didn't the link to contact the iTunes Store staff in the 'Additional Information' section of that article work for you? If you don't already have a valid rescue email address, only Apple itself can assist with recovering lost answers.

(88528)

I Need to change my security question

If you know their current answers then you can go to https://appleid.apple.com/ and click 'Manage your Apple ID' on the right-hand side of that page and log into your account. Then click on 'Password and Security' on the left-hand side of that page and on the right-hand side you can answer the 2 questions that are shown and you will then get a screen where you can select different questions/answers.

If you can't remember your current answers and you have a rescue email address (which is not the same thing as an alternate email address) set up on your account then similar to above, but instead of answering the 2 questions you will have a reset link below them.

If you don't have a rescue email address (you won't be able to add one until you can answer 2 of your questions) then you won't get the reset option - you will need to contact iTunes Support or Apple to get them reset.

e.g. you can try contacting iTunes Support : http://www.apple.com/support/itunes/contact/ - click on Contact iTunes Store Support on the right-hand side of the page, then Account Management , and then 'Forgotten Apple ID security questions'

or try ringing Apple in your country and ask to talk to the Accounts Security Team : http://support.apple.com/kb/HE57

When they've been reset (and if you don't already have a rescue email address) you can then use the steps half-way down this page to add a rescue email address for potential future use : http://support.apple.com/kb/HT5312 . Or if it's available in your country you could change to 2-step verification : http://support.apple.com/kb/HT5570

I really wanna change my security question

But I couldn't

Why can't you change them ? If you have a rescue email address on your account then you can use that, if not then contact Apple : http://support.apple.com/kb/HT5699