Abstract: One of the hot issues of the present study is how to match retrieval algorithm accurately while regarding the music emotion as retrieval keywords．Based on the fuzzy characteristics of emotion of music,the theory of fuzzy mathematics and AV emotion of vector space model were used to propose a novel music emotional fuzzy retrieval technology(MEFRT)．The most significant feature of this music emotion retrieval technology is music emotion to quantitative treatment．We can see a music contains different types of emotion from this method of retrieval．According to the membership value,the same emotional type of music can be smart ranking．People can more accurately find the music resources by this way．In order to prove the effectiveness of the MEFRT,a series of experiments were designed,and the metrics were calculated,such as recall ratio,precision,F value,relevance,C value,V value coverage and new rate,etc．

Key words: Fuzzy mathematics,Music emotion,AV emotion of vector space model,Recall ratio,Precision