Pressure and temperature are two of the most critical factors in the study of material properties. The magnetically driving device has the ability of pressure regulation, but does not have the sample cooling control technology temporarily in our country. Therefore, a set of cooling system matching with the loading area of the magnetically driving device is designed. Combined with the designed electrode plate structure and the test probe, the electrode plate and the probe in the load area are fixed in the right position. The purpose of cooling the sample is achieved by injecting compressed low-temperature liquid nitrogen into the closed gas chamber formed by the electrode plate and the probe tooling. Through the vacuum pump, the air in the closed air chamber formed by the electrode plate and the probe tooling is extracted to avoid failure of the velocity measuring probe due to the water vapor in the low-temperature condensed air. Based on the system, the ramp wave compression experiment of bismuth at low temperature is carried out, and the dynamic response data of bismuth at the initial temperature of - 80 ℃ are obtained, which verifies the reliability of the cooling system.