Abstract: The rapid development of information technology and the wide application of embedded system have brought revolutionary changes to people’s life. The combination of embedded system and Internet has become a trend of the future. Therefore, an embedded Web server is designed. This server uses hyper text transfer protocol and common gateway interface technology, increases database function. In the client, users can monitor local devices and admin historical data through Internet and browser remotely. The use of OPC technology achieves communication between the Web server and PLC. This monitor system can not only meet the needs of supervisory task, reduces the operation and maintenance cost, but also improves the efficiency. The system is of a very high value in use.
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Key words: embedded Web server, remote monitor and control system, hyper text transfer protocol, common gateway interface, PHP, OPC