This chapter provides a comprehensive overview of commonly used industrial dust collectors to help readers select the most suitable type based on specific operational requirements. The chapter first introduces the classification of dust collectors, detailing types such as gravity dust collectors, inertial dust collectors, cyclone dust collectors, bag dust collectors, electrostatic precipitators, wet dust collectors, and air filters, each suited for different applications and dust characteristics. Next, fundamental gas properties—including temperature, density, viscosity, and humidity—are examined for their influence on dust collection processes. The chapter then explores the properties of dust—both physical and chemical—and explains the primary mechanisms of dust removal in airflow. Finally, methods for evaluating dust collector performance are presented, focusing on metrics such as gas flow rate, equipment resistance, dust removal efficiency, and leakage rate. These elements provide a technical foundation for understanding, selecting, and assessing dust collector systems in industrial settings.