The OLAP(Online Analytical Processing) system built on warehouse is the most popular tool to analyze large-scale multidimensional data. With the development of information technology, data volume grows rapidly and data structure becomes more and more complicated, so the performance of OLAP system has dropped severely, failing to meet daily data analysis needs. This paper proposes new methods to store large-scale multidimensional data and perform aggregation query with Hadoop, a parallel computing system. Th...