Museums acquire. manage and use works of art in order to perform roles that fit their original purpose behind founding or mission statement. Because a collection is the foundation of a museum' s regular activities such as exhibition, education, research and studies, the question of what kind of works should be acquired, managed and de-accessioned is very important topic for all museum. For the museum to carry out collection activities, it need to clearly document its mission statement. The mission statement is closely related to functions within museum, and especially acquisition, management, exhibition, and de-accession of its collection that determine many of these functions, it plays an especially important role. In order to perform a stable management of the collection. a long-term strategic plan for acquisition and management on the basis of the mission statement needs to be established. Once a long-term strategic plan is in place. specific internal rules for a systematized total management of the collection. i,e .. a collection management policy must be in place as document. The collection management policy must address general contents with regards to acquisition, management, use, copy right, conservation and de-accession, and in addition, must be written within the limits of domestic laws as well as international treaties. Museum acquire their collection. usually through the methods such as excavation, donation/bequest, purchase, and transfer. The important point in the acquisition of a collection is to ensure that the museum attains the actual title, and accordingly prepare and save necessary document. In particular, when the museum acquires a work from a modern/ contemporary artist, the transfer of copyright, or shared title. or permission to use. etc .. must be left in the form of a written copyright document Once a work is acquired, it must go through the following steps conduct a condition report → assign a temporary holding number → photograph → write up an accession file → assign a permanent accession number → record in the manual system → enter into the computer system → subsequent management. After undergoing these procedures, it becomes part of the permanent collection. Above, I have surveyed the principles and rationals, and procedures of methods with regard to acquisition, management, use, and de-accession of a collection. If each museum establishes a systematic policy and procedures for collection management. it will greatly help the museum to perform its roles smoothly. Furthermore, museum are obligated to educate the pertinent personnel through continuous instruction about the meanings, values, and significances of the collection. Finally, research and studies on collection management should be fostered from academic and practical perspectives.