The recent development of high-throughput bio-techniques for post genomics has generated a large volume of gene expression data. Microarray data has made the new challenges which make many traditional data mining methods infeasible for mining the hidden knowledge. With the rapid progress of bio-techniques of post genomic era, more and more bio-information needs to be analyzed. Using microarray data can reveal the structure of the transcriptional gene regulation processes. In this paper, the authors give an overview of recent research work of microarray data mining.