Abstract: The paper studies the relevance between cognition and emotion of the sentence-final particle "ma(嘛)" based on semantic grammar and bi-optional methodology.First,we classified the previous studies into four groups,"obviousness" of the traditional grammar,"should know but don't know" of the descriptive grammar,"presupposition and insistence" of the functional grammar,and "high-degree marker" of the generative grammar and point out their pros and cons in description,verification and explanation.Second,we analyze the functional distribution of the sentence-final particle "ma" in the sentence and its semantic option and find out that its basic meaning is subjectively cognitive insistence and supposability.Finally,we classify four emotional types of "ma":dissatisfaction with anger,impatience with irritation,disobedience with fondness,and carelessness with casualness.