Lead-lined rooms are radiation protection devices made of lead, and they can be categorized into two types: medical lead-lined rooms and industrial radiation detection lead-lined rooms. Depending on the installation method, they can be divided into fixed, modular, and mobile lead-lined rooms. Based on their applications, they can be classified as lead-lined rooms and operator rooms. Lead-lined rooms feature reliable protection, flexible usage, good ventilation, high light transmission, aesthetic design, and elegance; medical lead-lined rooms are primarily used for dental CT scanners, panoramic dental machines, CBCT, standard dental machines, X-ray machines, and other radiographic rooms; industrial radiation detection lead-lined rooms are suitable for 450 kV and below detection machines, providing effective protection against X, gamma rays, and neutron radiation.