Abstract-Aiming at problem of "knowledge is flood in the data
ocean", the method of knowledge acquisition based on data
warehouse is studied in this paper. The structure of data
warehouse is introduced firstly. Then the study pays attention on
the designing and building a data warehouse. Data warehouse
offers a good platform for OLAP and Data Mining. Some
meaningful information can be acquired from data warehouse by
OLAP or Data Mining, which will provide valuable knowledge to
support business process.