Our Space Environment Simulation Chamber is designed to reproduce major environmental conditions encountered by spacecraft materials in low Earth orbit. The system integrates high vacuum, atomic oxygen irradiation, ultraviolet exposure, and thermal cycling, allowing each environment to be applied independently or in combination within a single platform. The chamber is equipped with a 2,200 L/s turbomolecular pump and a 1,000 L/min rotary pump, providing a base pressure below 10⁻⁷ Torr. A cryogenic cooling system and halogen-lamp heating module enable sample temperatures to be controlled from approximately −150 °C to +150 °C. An integrated UV-C source provides irradiation at wavelengths of 185 and 254 nm. The facility includes a retarding potential analyzer for particle-energy characterization, a Faraday cup for beam-current measurement, and multiple temperature sensors for monitoring test conditions. Additional ports are available for instruments such as a spectrometer and a quartz crystal microbalance. These capabilities enable detailed characterization of the simulated environment and quantitative evaluation of material degradation, including mass loss, erosion yield, surface modification, and changes in material properties.