This paper argues that a vision of a new social structure based on cooperation and harmony with the natural world is a disguising feature of American feminist utopian novels.

While traditional feminist utopian fiction presents a vision of an ideal society,feminist dystopian fiction depicts a nightmarish future world and warns people to reexamine themselves.

How to establish the ideal two-sex-relationship is the major concern of the feminist utopias.

This thesis is devoted to the study of utopianism in Toni Morrison s Beloved.

A systematic study of her works reveals that her writing has undergone a paradigm shift from deconstructing "hisland"(the patriarchal ideology)to constructing a "herland"(a feminist utopia),or in other words,a shift from feminist realism to feminist utopianism.

The formerly Utopianist is pioneer of Marxism,but Utopianist is short of middle stage,loses contact with reality and is not know how to live.

Having developed fast since the modern times,scientific utopianism in 20th century,encountered suspect and criticism from different perspectives,such as suspects within utopian horizon,criticism on technological society and reflection on technological civilization.

Since modern times,the ideal design of human future has been closely connected with science and thus formed the scientific utopianism with far-reaching significance.