To quickly and accurately prepare a medical care fee document based on a medical care result, to reduce the jobs of medical facilities and to reduce a cost by using an optical card and a personal computer(PC) for the preparation of a document relating to a medical care fee.

The PC 1 with a built-in medical care fee billing system is normally disposed at the reception of a hospital or the like and the optical card for an individual of an outpatient is read by an optical card input/output device 2 and received. A medical care fee reference is stored in the PC 1, medical care contents and prescription contents inputted to the PC 1 and updated are transferred to the PC 4 and the medical care fee document is immediately made outputtable. Thus, the medical care cost bill of a patient's share is immediately issued. The PC 4 for a medical care supporting system operation is installed in a clinic and confirms the attributes of the individual and health/ medical information in the past recorded in the optical card. Also, a medicine data bank is called by utilizing a communication network, required information is referred to and the prescription of administration medicines is decided.