Jeju dialect is considered to be valuable and should be preserved, so that dialectologists and zealots for Jeju dialect have tried to mention and practice its preservation and importance. The establishment of its policy, however, is beyond their capacity. Surveying the present situation on the preservation policy of Jeju dialect, this paper is to propose its prospects. First of all, the achievement of the 1st generation dialectologists is presented, and the activities of the 2nd and 3rd generation dialectologists are introduced. Moreover, the practices of the national and the regional language policy are discussed. The policy on Korean as a national language and a regional dialect is chosen to maintain and set up a cultural identity. Various ``competitions of Jeju dialect`` by self-governing communities and private organization have preserved spread Jeju dialect. It is certain that training the actors, establishing the position, promoting the educational environment, and keeping a record of Jeju dialect are proposed as a prospect of the preserving policy of Jeju dialect. In the aspect of the role of the related institution, it is necessary that expert groups, self-governing communities, and educational institutions should participate its policy positively. For the strategy of preserving and spreading Jeju dialect, a institutional device should be provided to apply intellectual property rights when the traditional cultural resources of Jeju called Jeju dialect are used as contents. It is believed that there is a lot of material for cultural contents to develop and use in Jeju. There is Jeju dialect in the middle of its cultural contents. Linguistic knowledge has to be accompanied to use the existed materials without asking questions. If it is not invested and practiced as a concept of public goods, the preserving policy of Jeju dialect will be a private(dead) document.