The purpose of this study was to develop an information system for home care service based on RAI(Resident Assessment Instrument). The standardization of service providing process was conducted using the steps of need assessment, triggers, application of CAPs, and care plan. The structure of MDsoft-HC was composed by MDS-CAPS system and system management system. A database on home care clients was accumulated by putting data, respectively, in general information, MDS-item, and MDS-result. Based on this data, the list of CAPs for the client was selected and monthly and annual statistics were calculated by problem result counts. It was suggested that standardization of a care plan would be integrated and short form of need assessment would be developed in the next stage.