21 century has seen a great prosperity of culture.People have the right to express their own ideas in a variety of ways . Among all the people who are eager to claim their voice , artist are the people who are most sensitive and represent a group of people to some extent . These artists exhibit their works in museum that every people can come to see their work and know their ideas . Before an art exhibition open to the public , it should be censored by government to confirm the art works in the exhibition has nothing to do with sensitive political issues , ethical issues and other issues which may have bad influence on the people . The censorship system helps to prevent some radical artists to express their thoughts in illegal ways but confines the freedom of artists under some circumstance at the same time. Therefore , it is necessary to build a concrete and rational censorship system so that artists can express their ideas freely and legally . 
To some extent , it is necessary for government to censor the artistic works or historical displays that a museum wishes to exhibit to confirm the ethical legality of these works . In 2006, some “Chinese behavioral artists” use the dead body of animals to express nihilism in their exhibition , which disgust the visitors and a American artists said that it disobey life ethics and this exhibition will not be allowed even in America . These artists take radical measures to pursue fame which does negative effect on people’s view on life . And government have the responsibility to restrain these phenomena . Government should censorship this kind of exhibition and prohibit it .
Although I admitted under some circumstance , censorship is necessary and prohibits some negative artistic and historical works , it can not be ignored that some artists’ freedom is confined by censorship that they can not express their ideas freely . New York government has prohibited a work by David , a American artist , to exhibit in New York portrait museum , reasoning that his work in which a dying AIDS patient is described expresses an unhealthy view of sex . On heard of that , citizens in New York are angry and organize a revolution to express their dissatisfaction on government . New York government has disturbed an artist’s freedom and his right to claim his idea . Under such circumstance , the government should not censor the artistic works to protest the variety of culture .
 Despite the possible deterioration of culture diversity , censorship may lead to a concealment of truth . American government once prohibit a America and  Afghanistan War photography exhibition which expresses  the miserable circumstance of Afghanistan’s people . The government use their authority to maintain their military authority and assert the war is justice . This censorship conceals truth from public and should never be occurred in any exhibitions .
 As mentioned above , censorship on museum’s work is a two-edged sword . We should build a more concrete censorship institution that government would take different manners under different circumstances . Only by doing that can we have a healthy culture and historical environment .