Abstract: This article reviews the research on the Assessment Center (AC) in these years. First, it discusses the impact of the number of dimensions on rating results and the four meta-dimensions in AC. Second, it introduces the indexes of rating accuracy in AC and expounds different types of rater training programs and their impact on rating accuracy. Third, although AC has proved good criterion-related validity, the research on its construct validity has not yet reached an agreement. Finally, it discusses the trend of future research briefly.

Key words: assessment center, dimensions, rater training, validity