We report a portable and robust home-built atom gravimeter (USTC-AG11) continuously working in a seismic station over 5 months. Based on the principle of matter-wave interference, the atom gravimeter is very sensitive to the local gravity and can reach the precision of micro-Gal (1×10-8m=s2) level. With the technique of vibrational compensation, the sensitivity of the atom gravimeter reaches 38 µGal=pHz, which is almost immune to the ground vibration noise. The design of the atom gravimeter in the electronics and laser optics, especially the laser frequency and phase auto-relock technology, guarantees the long term continuous running. The long-term precision of the atom gravimeters is better than 2 µGal, which is comparable to the best classical gravimeter FG-5(X). Our work provides a novel application for the high precision atomic gravimeter based on modern quantum sensing technology in the field of geophysics and geodesy survey.