Large geodesic laser gyroscope is an inertial sensor based on Sagnac effect,which can accurately monitor the angular velocity of the earth rotation.It has a good application prospect in the fields of universal time,seismic wave detection and fundamental physics.The geodesic laser gyroscope is sensitive to the change of ambient temperature.The change of temperature changes the cavity length of the geodesic laser gyroscope,and then causes the change of the scale factor,and finally affects the test accuracy of the geodesic laser gyroscope.In this paper,the relative error of geodesic laser gyroscope is analyzed and discussed by measuring the temperature in different working environments when the temperature changes and the heat source location is different.When the temperature change is maximum,the relationship between the material usage and the relative error of the ring cavity of the laser gyroscope is analyzed.The results show that the working environment of Pucheng Laboratory is better than that of Lintong Laboratory when the temperature change in the laboratory is the largest,and the relative error of different configurations of geodesic laser gyro ranges from 10-6 to 10-9.The relative error decreases when the amount of Zerodur is increased in geodesic laser gyroscope.