An air purifier is disclosed and includes a main body, an air guiding fan, a filtering component, and a controller. The main body is configured to form an airflow path. The air guiding fan is disposed in the airflow path and is operated to guide an air convection with a clean air delivery rate (CADR) over 600 m3/h. The filtering component is disposed in the airflow path and filters an air pollution in the air convection guided by the air guiding fan. The networking controller receives a control command through wireless communication to perform an activation operation of the air guiding fan.