In view of the accuracy of the position stabilization time of industrial robots, enterprises and inspection institutions have been constantly studying and improving the detection methods. Through the comparative experiment of the laser tracker and the cable CompuGauge, the uncertainty measurement model is built, and the measurement repeatability, digital resolution, indication error and coordinate alignment are analyzed and evaluated using Class A and B methods. The expanded uncertainty of the laser tracker and CompuGauge are U1≈0.11 s and U2≈0.19 s respectively, and finally laser tracker；CompuGauge；position stabilization time；expanded uncertainty；|En|≈0.5. The experimental results show that the results of the laser tracker are more concentrated, stable, and more accurate, but are most affected by coordinate alignment, while CompuGauge is easy to operate, time-saving, independent of the robot model, but most affected by indication error.