There are lots of items of a great variety, and discordant process for current maintenance processes. It will make some misunderstandings or double standard that the same item will produce different process because of different management agencies, and the same process will produce different means because of using different rules, so it is necessary to unify and compress maintenance processes. This study is as Directorate General of Highway, M.O.T.C an object of study, and as pavement management a point. We’ll use IDEF method to analysis and simulate operating process, to identify the Effectiveness of current maintenance operation, improve current maintenance flow path, and make cost analysis. The study will restructure pavement maintenance operating processes and find out the important parameters of each operating processes.