In order to study the stability, compatibility, storage life and the decomposition mechanism of the energetic materials, a new test method named dynamic vacuum stability test (DVST) was established based on the principle of vacuum stability test method. The related instrument was set up with all internal-planted pressure sensor and temperature sensor in the test tube. The changes of the pressure and temperature of the tested samples can be detected real-time directly with the instrument. So the materials can be investigated continuously online. It provides a more accurate result of the stability for the tested materials after proper analysis of the acquired data from the instrument.