Since the first publication of Academic Ranking of World Universities (ARWU) in 2003, we have received numerous requests to provide ranking of world universities by broad subject fields/schools/colleges and by subject fields/programs/departments. In addition, many top Chinese universities are interested in learning their positions in the world by subjects. In response to the requests, we have been studying the possibility of ranking world universities by broad subject fields. This is the final results of 2008 Academic Ranking of World Universities by Broad Subject Fields (ARWU - FIELD 2008); top 100 world universities in each of five broad subject fields are provided. The ARWU - FIELD will be updated annually, please send any questions and comments to ranking@sjtu.edu.cn