An　Embedded　ECG　monitor　is　introduced　in　this　paper.　It　is　based　on　the　S3C44BOX　single-chip　microcomputer,　which　is　32-bit　low　power　micro-controller　belonging　to　Samsung　Company.　This　instrument　could　sample　ECG　signal,　and　analyze　the　signal　at　the　same　time　and　alarm　the　patient　if　ECG　is　abnormal.　It　has　network　interface,　so　it　can　be　linked　to　network　and　realize　the　tele-diagnosis　based　on　the　Internet　network.