Dr. Soetomo general hospital in surabaya has computerized their administration system base on the indonesian health department standard. it calls sistem informasi rumah sakit (SIRS) and it only generates structured information. so far, SIRS can not generate unstructured information for supporting decisions making. due to the problem, this research focuses on develop data warehouse and online analytical process ( OLAP) tools for supporting decision making about inpatient, payment, and surgery. the application includes a transformatio process from SIRS database into OLAP warehouse database, and processing OLAP warehouse database into multidimensional povot table, and generating graphiics. the aplication was developed using oracle 9i as the database as the database and net beans 5.5 as programming language.