An　embedded　ECG　recorder　based　on　ARM9　and　Linux　RTOS　is　introduced　in　this　paper.　It　is　based　on　S3C2410X　which　is　a　32-bit　low　power　micro-controller　manufactured　by　Samsung　Company.　We　transplant　Linux　RTOS　into　S3C2410X　and　develop　the　application　based　on　Linux.　MiniGUI　is　adopted　to　design　the　user　interface.　This　system　could　acquire　ECG　signals,　display　and　analyze　ECG,　and　send　alarm　via　GPRS　when　ECG　signal　is　abnormal.