The Locomotive Remote Monitoring system is a type of information system suitable for monitoring the remote equipments in running trains, which is used to raise the fault alarm, provide reference to maintenance and enhance the repair for the trains. A very important part of the LRM system is to draw a dynamic picture for the data collected from the train, transmitted through the wireless and internet, parsed into the database, which is used to analyze the equipment status in the train by the engineer. In the three-leveled B/S architecture of J2EE environment, designing your own java painting classes for the picture is not strong enough, so we introduced the JFreeChart Open Resources, which is the best solution for Java Painting Report. The implementation of JFreeChart in the LRM system is illustrated, which can be referred by the applications in similar area.