A monitoring system based on the embedded Internet technology for embedded devices is designed and implemented. The Browser/Server mode is adopted in this monitoring system and the realization technologies of an embedded Web server, which includes a thin TCP/IP stack, an embedded file system and a device gateway, are discussed in details. The way of embedding the Web server in the device makes it possible for numerous embedded devices to be connected to the Internet. The results of system performance testing show that the system can meet most of the embedded Internet applications demands and the purposes of online access, control and management the embedded devices using a standard Web browser over the Internet can be realized.