Abstract: The relationship of positive and negative emotion is one of the most hot-debated foci in the field of emotion research. In this article, we reviewed the models and corresponding researches addressing this issue from four aspects, including: (1) Bipolar model of emotion and corresponding evidences; (2) Bivariate model of emotion and corresponding evidences; (3) Mixed model of emotion and corresponding evidences; (4) New view to resolve the conflict among these models: conditional theory. In the end, the deficiencies in this area were analyzed and some suggestions were provided for future studies

Key words: emotion, bipolar model, bivariate model, mixed model