A method and a system for using RFID (Radio Frequency Identification) in the workflow of a blood center and a medical institution from a network Customer Relationship Management (CRM) information system. The CRM comprises an RFID technique system, a computer database system, and a computer information network. The information transferred between an integrated circuit and a reader-writer occurs through the radio waves in the workflow of, for example, a blood center or other medical institution. The related information ranges from identity information to biological product information. In each procedure of the blood collecting and supply workflow, the information is read/written by the computer into electronic tag and through the computer information network into the service management information system. The work flow of blood centers (stations), such as blood test reports before and after blood transfusions and the desired information of people and objects involved in blood transfusions, can thereby be recorded completely, integrally, precisely, and comprehensively by the RFID system.