This paper introduces one design method of ECG service system based on the electrocardiogram sampling module and intelligent mobile phone. This paper gives the basic structure of the system at first, then the focus is given to the design scheme of a Bluetooth interface ECG machine and the software design method of mobile phone terminal, in which the ECG machine is designed using special ECG module AIKD812-256 and Bluetooth module HC-06, the function of Bluetooth communication, data storage, electrocardiogram data sent to the server is realized on J2ME programming platform, and the key code in the realization is analyzed. The test result of the ECG machine is given at last. Test results show that the design of the ECG machine can be used for remote medical treatment and care.