Pulmonary infection, or pneumonia, is one of the most common diseases of the respiratory system, so it is recommended to hang a respiratory medicine department for the doctor to decide to improve further tests, like films and blood tests to clarify the diagnosis and understand the severity of the patient’s condition before deciding on further diagnostic and treatment measures. There are some special cases that need to be registered with other departments: 1. If the patient has a fever at the first visit, such as a body temperature of more than 38.5℃, it is recommended to register with the fever clinic first to investigate infectious diseases, such as influenza virus, and then transfer to the respiratory medicine department for consultation and treatment; 2. The patient’s lung infection is critical and has affected vital signs, such as shock, respiratory failure, and impaired consciousness, so the patient needs to be treated directly in the emergency department and then transferred to the respiratory medicine department for further treatment after the patient’s condition is stabilized. If the patient’s condition continues to worsen, it is recommended that the patient be transferred to the intensive care unit for further consultation and treatment.