With the developments in medical information systems and the widespread establishment of medical information systems that include computerized order communication systems (OCSs), there has been an increase in the establishment of computerized chemotherapy order systems. In this study, we aim to design an improved computerized provider order entry (CPOE) system that integrates a chemotherapy ordering system that can issue a customized order in response to a provider's diverse chemotherapy prescription needs with an automated issuance of dosage, treatment schedule, and treatment method. We expect the newly designed system to be able to prevent the common errors in complex chemotherapy ordering systems and reduce the time required for ordering.