Aimed to solve the dimension diversity problem in the hotspot analysis, a novel method based on keywords' matrix is proposed in this paper. Firstly, the key words which obtained from certain texts are listed in different columns of the keywords' matrix according to the part of speech and weights which is calculated by TF-IDF method. Then, according to the analyzer's selection of the analysis rank, all of the keywords' matrix will be clustered by FCM strategy, and the results will be the hotspots. The experimental results show the effectiveness of the algorithm.