Based on the analysis of the inadequacies of the current portable ECG detection system, a new Band-Aid-like electrocardiogram was designed. The MCU of the device is MSP430 and the wireless transceiver is Bluetooth. And This device is as a platform for local processing ECG method based on a fast heart rate algorithm. The amount of the algorithm is small, and it is dedicated to the low power MCU to process ECG real-time. In this way Band-Aid-like electrocardiogram can complete the 24-hour real-time detection and does not affect the normal life of people.