Progress of optical phased array (OPA) technology based on electro-optic material is summarized. The basic principle is introduced and the basic structure and key techniques of OPA are reviewed with different electro-optic materials, including LiNbO3, AlGaAs waveguide, liquid crystal and lead lanthanum zirconate titanate (PLZT) ceramic and so on. The development of OPA based on PLZT electro-optic ceramic material is reviewed emphatically, and the latest achievements in the areas, such as single-stage OPA, cascaded OPA, and OPAs with surface electrodes and up-down electrodes are listed. The applications of OPA in laser radar are also introduced briefly.