Abstract: The essential relationship and equal value transformation of Non-Finite Automat, Finite Automat and Gauge Finite Automat (abbreviated as NFA, FA & GFA) is studied. An equal value transforming algorithms of "NFA→FA" and "FA→GFA" are given, the existing nature from FA To GFA is proved by construction, with which the basis of an algorithm research on the minimum of an Automat is provided.