Abstract: The high-repetition 3-5 m mid-infrared solid-state laser has gain a lot of attention for its potential applications in civil and military. Because of the characteristic of solid-state laser, the temperature gradient of resonator and the environmental vibration in the transmission will influence the pointing of laser to generate quite large jitter and drift, which cannot be applied in some fields that the requirement of pointing precision is quite high. In such case, the monitoring and alignment system after laser are installed to control jitter and drift of laser beam. Therefore, there are two kinds of detector will conduct the comparable experiments to verify the performance. One is the infrared quadrant detector and the other is pyroelectric array camera. The experimental results show that the pointing errors for these two detectors are about 9. The pointing error of pyroelectric detector is 5.39. The quadrant detector has wider bandwidth than the pyroelectric array camera and the pyroelectric array camera based on the thermal image is more intuitive. Therefore, for the mid-infrared laser, corresponding detector can be chosed to built up the monitor system based on the applications requirement.