  Regarding the current status of the superstring theory, despite its fully
developed contents of all interactions in nature, it is no doubt that
unfortunately it lacks a well established early universe cosmology content,
that is, the inflationary universe. In the present work, we would like to
address precisely this issue. To be more concrete, we would like to demonstrate
that remarkably it is the well established open string tachyon condensation
which is essentially equivalent to the stringy inflation that has been missing
and hence long-seeking by nearly the entire string community.
