AEROSOL GENERATING DEVICE AND OPERATING METHOD THEREOF

An aerosol generating device includes a housing including an opening into which an aerosol generating article is inserted, a heater assembly located inside the housing and including an accommodation space for accommodating an aerosol generating article that is inserted through the opening, an airflow passage located between the housing and the heater assembly to allow an outside of the aerosol generating device to fluid-communicate with an inside of the accommodation space, a sensor arranged adjacent to the airflow passage and configured to detect at least one of a pressure change and a temperature change in the airflow passage, and a processor electrically connected to the sensor and configured to output a notification of a user's puff action, based on the at least one of a pressure change and a temperature change of the airflow passage.