The 9th International Laser and Optoelectronics Conference (LOC 2024) will be held during December 6-8, 2024 in Sanya, China. LOC 2024 is organized by the Engineering Information Institute and co-sponsored by Spectral Branch of Jilin Provincial Society for Analysis and Testing Technology, the Scientific Research Publishing, and other institutions. This Conference will cover issues on Laser and Optoelectronics. It covers issues on Lasers, amplifiers, micro/nano-photonic devices, Laser Processing of Materials, Terahertz Technologies and Applications, Ultrafast Optics, Optoelectronic Devices and Applications, Short-pulse, solid-state, semiconductor, fiber, waveguide optical sources and devices, Active Optical Sensing and Metrology, etc. LOC 2024 dedicates to creating a stage for exchanging the latest research results and sharing the advanced research methods.