This paper summarizes the research work of North China Research Institute of Electro-Optics (NCRIEO) in the field of solid-state laser technology since 1964. In the first 30 years, NCRIEO had helped “two bombs and one satellite” and laid the foundation stone for independent and controllable development of laser gain crystals. Since then, the research on laser materials has gradually focused on industrial development, with extensive involvement in the subdivision of laser devices and breakthroughs in laser applications. This paper introduces NCRIEO’s completed key projects, important technological breakthroughs, developed professional directions and current industry status, discusses the development direction of laser technology at NCRIEO in the future.