A mobile 1064 nm Mie scattering lidar system has been developed which can measure the vertical aerosols backscatter coefficient and horizontal visibility. The configuration and specifications of the Mie scattering lidar system are presented and the designed alignment of the optical mechanic unit is described. As a mobile system,the transportation stability of the lidar system is solved and the optical transmitting and receiving axis are well aligned. Validation experiments are made in Hefei. The vertical backscatter measurement is compared with another 532 nm Mie scattering lidar and the visibility measurement is compared with Belfort 6230A visibility sensor. Both results are in good agreement which indicates the new made mobile 1064 nm Mie scattering lidar is stable and reliable.