what kind of license do i need to open a pizza shop in s.f and how it will take to get those license?'?

You'll need a business license.
An agriculture permit to produce and sell food.
And a tax permit from your state.
you'll also need to display a certificate from the health dep't saying that you have passed their inspection

You need a business license as well as a health department permit (which will include an inspection).

in san francisco