Control method, program, and control device

The control method of the present disclosure is a control method in a system, in which a smart contract obtained by programming a therapeutic measure determination in an executable manner is stored in a distributed account book, the therapeutic measure determination being obtained from a consensus result of a patient and a doctor, and in which the smart contract is stored in the distributed account book. The present invention obtains condition transaction data including biological information of a patient obtained from a sensor (S205), obtains insight transaction data including information related to a diagnosis result of a doctor with respect to the biological information (S210), and executes a smart contract on the basis of the biological information and the diagnosis result included in the obtained condition transaction data and insight transaction data. And outputs medical advice information (S211, S212) relating to a treatment measure to be performed on the patient, said information being obtained by the