| The power transformer is one of the most important equipment of electric system. Its status directly affects the safety of the electric system. The dissertation points out that efficiently and scientifically applying transformer condition information is the basis for the transformer maintenance, systematically analyzes the information acquired. Firstly, study the basic theory of data warehouse and OLAP. Form a multi-dimensional data model based on the latest revised demand,place the data in data warehouse according to the model. Adopting Oracle database and Oracle development kits, have designed an Analysis System by means of OLAP,analyze and design the data cube according to OLAP. At last the subject-oriented data are showed by OLAP technique,and the knowledge needed in decision making is attained.
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