Shielding engineering utilizes the principles of the Faraday cage to construct electromagnetic and radiation protection barriers around a specific space—employing specialized shielding materials and technical methodologies—thereby achieving the dual objective of "blocking external interference while containing internal emissions."

Protection Against External Intrusion:** Blocks external electromagnetic interference (such as lightning, radio frequencies, power-frequency magnetic fields, etc.) to safeguard the normal operation of equipment.

Protection Against Internal Leakage:** Prevents electromagnetic signals generated by internal equipment from radiating outward, thereby ensuring both information security and personnel health.