All the field of industry in the 21st century makes a change in the policy which inclines toward a customer's demands and interesting. Besides, the social circumstances call upon the people to carry out the lifelong education, and the globalization calls upon the each region to establish cultural identity. Among the people the aspiration of art objects and acculturation of culture are increasing day after day. Museums in the 21st century are coming together on the hub of lifelong education, edutainment, cultural tourism and daily life. Nowadays, many museums are interested in their role of education more than other functions such as collection, conservation, investigation, study and exhibition. The educational role of the museums is enlarging and its function also needs for mutual correspondence among the educational materials, educators and the public. And the key map about education is changing from directive teaching to self-regulating learning. In the educational activities of museum, educational materials can be situated in various forms. The educational materials of museum are passageway that delivers messages in mutual understanding between museums and spectators, and they can be defined as instrumentation leading to learning as arbitrator between two ways. And the materials shall meet with spectators by various modes and symbolic systems, and the materials can be called various sources in the museum experiences. In other words, the materials should be applied properly according to spectator' s demands. The practical uses of educational materials secure qualitative elevation of museum service, spatial extension of museum education, development of spectator as well as competitive power in cultural industry We can hereby realize democratization of culture and cultural democracy, and expect the effect of development of local community. As a result they can realize 'MI(museum identity)' positively. lt nevertheless is the slight level to develop and utilize the educational materials in Korea. In addition to that the study and discussion of that are not achieved enough yet. Under these proposition I exarnined about present conditions of the developments and practical uses of educational materials of Korea' s museums laying stress on the National Museum of Korea, the National Museum of Contemporary Art, the National Folk Museum, and so on. In investigation results some problems are deduced which include insufficient relation with school and unpreparedness of data to family and disabled person. According to these situations, I wish to propose some ideas to utilize more efficiently the educational materials of museums. Firstly, the development of educational materials for school link education. Secondly, the development of data and materials for farnily unit spectator. Thirdly, the establishment and activation of education data center. Fourthly, the construction of link system between on-line educational materials. Finally, the continuous upbringing and supply of special educator.