In this report, we describe the data base system developed for various statistical analysis of KAERI computer system usages. In keeping abreast with the rapid growth of information society, many devices for handling information are developed and purchased. At KAERI`s computer operation facility, several information processing devices have been installed and are under operation now. It has been found very difficult to draw up a long term plan for computer operation management due to the lack of accumulated operation history data. Combined charge information is generated and transferred to the VAX 6320 system. The data base system on the VAX 6320 was implemented using the ORACLE RDBMS software. The computing services history data was all processed and collected into the data base for the fiscal years 1990 and 1991. It is expected that this data base will be used in many convenient ways in the future. (Author).