As EAST discharge experiments will produce a large amount of experimental data, it becomes necessary to organize these experimental data to make users can efficiently obtain them and understand the progress of experiments. In this study, we propose the EAST instant messaging system based on the Openfire and Spark framework, which can communicate instantly, share files, and subscribe the experimental results. But, we focus on the subscription and push function. The Subscription/Push includes two parts:front-end subscription website and the back-end push system. Researchers can subscribe their experimental data in website. The read thread of the back-end push system will read data from MDSPlus once new experimental data generates, then the data processing thread will handle them and package into Messages with the users' JID, finally the send thread will send Messages to the server. The system is designed to solve the problem that researchers cannot obtain the progress and the results of experiments in time and it provides a good commu- nication platform for EAST experiment.