18. A voice recognition method for replacing a specific domain, the method comprising: dividing a search space for voice recognition into a general domain search space and a specific domain search space and storing the spaces; selecting, by a user, a specific domain search space; judging whether the specific domain search space selected by the user is stored; loading the specific domain search space selected by the user when the specific domain search space selected by the user is stored; creating the specific domain search space when the specific domain search space selected by the user is not stored; and performing voice recognition through linkage of the selected specific domain search space and the general domain search space.
18. A voice recognition method for replacing a specific domain, the method comprising: dividing a search space for voice recognition into a general domain search space and a specific domain search space and storing the spaces; selecting, by a user, a specific domain search space; judging whether the specific domain search space selected by the user is stored; loading the specific domain search space selected by the user when the specific domain search space selected by the user is stored; creating the specific domain search space when the specific domain search space selected by the user is not stored; and performing voice recognition through linkage of the selected specific domain search space and the general domain search space. 19. The method of claim 18 , wherein in the dividing of a search space for voice recognition into a general domain search space and a specific domain search space and the storing of the spaces, transition information to the specific domain search space is included and stored in the general domain search space, and in the performing of the voice recognition, the voice recognition target word is decoded by moving to a specific domain search space corresponding to the transition information when the transition information to the specific domains search space is reached while decoding the voice recognition target word in the general domain search space.