File exclusive principle means that the administrative subject, when making administrative behavior, should rely on the file only, rather than on the unknown or unproved facts of the party beyond the file. And the file exclusive principle can not be equal to hearing & notes exclusive principle. In addition, file exclusive develops from the original unilateral proof plus prejudice into the unilateral proof exclusion, from the formal procedure ruling into the informal procedure ruling, from the British & American legal system into the continental legal system. The universal applicability of file exclusive principle lies in its profoundness, i.e. it enables the role of procedure visible, and in turn, ensures the fact elements and legal elements evidenced in the procedure are the sole foundation for making administrative behavior, which then realizes the function and value of the procedure.