Abstract.A VMS (Variable Message Signs) has the different sizes and various shapes according to the city scene and the kinds of road and it has to be displayed by variable message on the display device panel in real-time. So, VMS manufacturers must produce the different products each order made. In addition that, they should test and check the correct operation to each VMS order made goods using the variable message frame. That is very time and workers consuming and an automatic variable message generator system using visualization tool is necessary. In this paper, we implement the visualization tool for the automatic variable message generator which can generate the data fields that consists of the variable message frame and can generate many kinds of window controls in order to input the valid data value for the instances of data field easily using the visualization tool.