This paper introduces the role of atomic vapor cells in hot-atom precision measurement systems and discusses the principal physical mechanisms governing atomic spin relaxation, as well as their effects on polarization lifetime, coherence time, system noise, and long-term drift. The processing characteristics, applicable scenarios, and development trends of conventional glass-fabricated vapor cells and MEMS-micromachined vapor cells are compared. The effects of material selection, structural design, wall-surface treatment, buffer-gas metering, and thermal and magnetic environment management on vapor-cell performance are also analyzed. Looking ahead, the development of atomic vapor-cell processing and manufacturing should focus on establishing an engineering-oriented characterization and evaluation framework based on intrinsic parameters, including atomic number density, spin polarization, and relaxation time, together with the performance requirements of representative application systems. Key error sources should be controlled at the stages of vapor-cell design, fabrication, and evaluation. By establishing the underlying physical correlations between manufacturing parameters and device performance, atomic vapor cells can be advanced toward standardized devices with reproducible performance, predictable service lifetimes, and compatibility with large-scale production.