Abstract: The status of city water environment monitoring in home and abroad is briefly introduced. On the basis of discussing the monitoring request, it is described that the technique advantage of LonWorks adapts to monitoring system, from the aspect of frame, function and application. Especially, the processor of neuro chip, application I/O port, memory mirror and service of LonTalk protocol are analyzed. Then, the paper presents the monitoring system based on LonWorks, and accounts for the function and procedure of each section. A detailed study of the measure container, frame of local control layer and configuration of iLon100 server is carried out. At last, the problems which are worth researching further are put forward.

Key words: intelligent and distributed pattern, LonWorks, neuro chip, biosensor, fibre sensor