Google couldn't follow your URL because it redirected too many times.

[WearYouWant]

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[DanDeceuster]

If URL A redirects to URL B which redirects to URL C which redirects to URL D which redirects to URL E finally redirects to URL F, then Google isn't too happy about that. Just have URL A, B, C, D and E all redirect to URL F directly.

[WearYouWant]

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[DanDeceuster]

I'm not sure what you mean exactly. You aren't changing the destination URL's here, so nothing in the index should change. Just have any URL that redirects only redirect to a destination URL, not another redirecting URL.

[WearYouWant]

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[WearYouWant]

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[Everett]

Your question is:
"When i already change all of them, How much effect to ours old index ?"

I think there are some translation issues here since English is not your first language. If I understand your question correctly...

If you have changed the redirects so URL-a.html now 301 redirects to URL-b.html then URL-a.html should eventually drop out of the index. All of its page-rank will then be given to URL-b.html, which should eventually begin ranking near where URL-a.html once was. Some page-rank may be lost in a redirect, but not much.

Often when Google says there are too many redirects it isn't because you are redirecting to different pages (e.g. URL-a.html goes to URL-b.html goes to URL-c.html). Instead, it is often because the redirects are set up in a kind of loop so there never really is an end to it. One example would be if http://yoursite.com redirected to http://www.yoursite.com/, which redirected to http://yoursite.com. Just make sure that is not the problem.

You should check your redirects using an HTTP status code tool like these:

http://tools.seobook.com/server-header-checker/
http://httpstatus.io/