There are many searches on psychological text analysis, and it has been proved that the words people use can reflect their emotional states. In this paper, we introduce how to analysis the psychology of the characters in vernacular novels automatically. First, we process the dialogs with word segmentation, and analyze the segmented text with SC-LIWC. Then, a vector reflecting the psychology of character is ob-tained and mapped to the big five. Finally, taking the dialogs of the Journey to the West as corpus, We have got the personalities of four main characters which are verified to be same to some famous comments of the Journey to the west, which shows that our work is effective.