A service data record system (SDR) and a data record method used to record data of an electronic device, such as a point of sale or service (POS) device. The electronic device includes a plurality of electronic units and a control unit. The control unit is used to receive and sift electronic data set of the electronic units. The service data record system includes a storage unit and a micro processing unit, and the micro processing unit is connected with the storage unit and the control unit. The micro processing unit is used to receive the sifted electronic data and transmit all the received electronic data to the storage unit.