Dermatoglyphs and Bai nationality are genetically close related. In this report it is analysed by statistics. The dermatoglyphs of Leme, a branch of Bai nationality located in Lanping Bai-Pumi Autonomous County of Yunnan province were collected and compared with 26 related ethnic populations. We found it is quite a pure population of Bai, and shall be one of the most valuable representatives while studying the origin and development of Tibeto-Burman and Bai ethnic system. We also transformed the data to fit the principal component analysis, which broke through the limitation of cluster analysis in former dermatoglyphic studies. As this statistics method worked well, it brought out new space for development of dermatoglyphic studies.