Up to the present, ISO 9000 series have contributed which construction of quality management system and improvement of quality competition. Therefore many enterprises have taken an increasing interest in ISO 9000 series and the number certification of it is on the increase every year. In these processes, the side effect has come out. It is of no use to competitive power of enterprise. Because they made an effort for certification without preparation for a short period or there was no continuous system control. In this paper, We review the weakness of existing ISO 9000 series, which have soon ahead of revision. In addition, We propose the considering items or contents in revision for enterprise competition power.