With the globalization of economy and coming of information time，public opinions on network is becoming the main channel for the public to express their emotions and the main tool to join in the social supervision. Facts have proved that any important construction project or big activity that has something to do with the life of the citizens would cause various kinds of public opinions on the network，and it is necessary for us to take active and effective measures to meet them. Beginning with the success and failure in treatment of the event of garbage burning in Panyu of our city，this study makes an analysis of the channels through public sentiment would form and propose some measures of how to establish emergency treatment system of public sentiment on network.