Various types of protocols with several kinds of anti-tumor injections and various dosing regimens have been applied in cancer chemotherapy. The protocol is usually decided depending on the patient backgrounds including gender, age, weight and height, and type and stage of cancer. Consequently, it is well-accepted that cancer chemotherapy is one of the most risky types of pharmacotherapy. It is important but usually difficult to manage patients undergoing cancer chemotherapy. As a result, we decided to develop a cancer chemotherapy management system using computer programs. Database sets and operating programs have been developed for 10 protocols using Microsoft Access, which have enabled us to check the trade names, dose, and dosing schedule automatically. Moreover, this system indicates the recommended doses and date of administration. This system is therefore considered to be useful for the management of cancer chemotherapy patients.