【正文】 /IP protocol. Equipped the system by digital temperature sensor, it can be used to measure industry field temperature and transmit the results to puter through work, and then get temperature curve. And its measure and control range are all 10~125℃ ,the accuracy is 1? ℃ , the resolution reaches ℃ . This system have many advantages such as simple structure,better universal, municating through work, flexible usage, low cost etc. It can be adapted by various of intelligent sensor and has better extend ability. It can be used in the fields of remote data acquisition, remote measurement and control and so on. Keywords: Embedded MCU Network Measure and Control System。 Digital Temperature Sensor. The development history of the measure and control system experienced six phases in the following. (1)The traditional control system consists of MCU, PC or IPC. (2) The measurement and control system based on PC bus. (3) Distributed Control System (DCS). (4) DCS system based on LAN. (5) HART bus which is developed by the 2wire 4mA ~ 20mA standard signal, and is a kind of fieldbus used between the intelligent field equipment and automatic control equipment. (6) Since 90s of the 20th century, with the rapid development of the Inter, it bees possible that more quickly, more convenient and more economical gaining and exchanging information. So measurement and control system can bee the client of the global work. At present, the remote control system based on inter is driving the development of measurement and control technology, and has been applied in monitor fields of the nuclear power station, the oil transport pipeline, the power works run and robot. The remote control system based on inter has advantage of the quick information transfer, strong interactivity and low cost, while it can achieve data sharing. The existing work control equipment use mostly MODEM chip, with the PPP protocol dialing to the inter or special work by telephone work. Although this method can realize the work control and data transmission, it depends on the telephone, make its use cost increase significantly. Additionally, transmission speed is no more than several hundreds kbps (usually only a few tens kbps or lower) because of the limit of telephone work, and it is not adequate for the needs of large quantities of data transmission. Therefore, the work measurement and control technology based on Ether get more and more important. The ether is a widely used LAN standard, which can be defined by standard, and it can support 10Mbps, 100Mbps, or 1000Mbps bandwidth, often with twistedpair cable or fiber as the transmission medium. Its characteristic is the low price, mature technology, flexible application. Scheme of Edesign Plandesign Plandesign Plandesign Plandesign Planmbedded Microcontroller Network System It is a type of embedded MCU measure and control system based on Ether work system, using a microprocessor with 8052 as kernel. It realized mon ARP, IP, ICMP, TCP and UDP protocol part function of TCP/IP on Ether by controlling RTL8019AS which is a special Ether chip. It can be used as an independent system on Ether work. Any puter on Ether can visit the system via the standard TCP/IP protocol, transport control mands or data among them. The system function has the following characteristics: (1) the simple structure。 in thermostat mode, user need to program t