Abstract: To achieve real-time graphical display of observational data or control processes/statuses of an astronomical telescope is an important part in the development process of instruments for the telescope.As Linux systems are being extensively applied in astronomy, it becomes a pressing demand to develop real-time graphical-display systems based on Linux graphical interfaces for astronomical telescopes.In this paper, we present a method that uses a Qt framework to achieve real-time multi-monitor graphical display to meet the requirements for the MUSER (Mingantu Ultrawide Spectral Radio heliograph, which is originally called the Chinese Spectral Radio Heliograph, or CSRH).We have validated the method through real-time display of cross correlations and auto-correlations of signals detected by the radio antennas of the MUSER.Our experimental results show that our method can meet the requirements of real-time observational monitoring of the MUSER.It has merits such as simplicity, fast response, and excellent portability.The method also overcomes the difficulties of X-WINDOW programming under a LINUX system.Our study can serve as a reference for designs of systems of similar functions on other telescopes.