An air purification apparatus for purifying and discharging polluted air, comprising: a first flow path which is a movement path of air; a second flow path which is a movement path of the air; a main pipe including a first filter positioned between the first flow path and the second flow path and configured to collect at least some of contaminants contained in the air, a first main area positioned between the first flow path and the first filter, and a second main area positioned between the second flow path and the first filter; a control unit configured to control the air purification apparatus to operate in a filtering mode or a cleaning mode, a heating unit controlled by the control unit and configured to emit heat to increase a temperature of the first filter for cleaning the first filter; and a first temperature detection unit connected to the control unit and configured to acquire information on the temperature in the first main area; wherein, in the filtering mode, at least some of the contaminants contained in the air introduced into the main pipe are collected in the first filter, wherein, in the cleaning mode at least some of the contaminants collected in the first filter in the filtering mode are removed, wherein the cleaning mode includes an operation section which includes a first section and a second section, and the first section and the second section are divided with respect to a first division time point, and a temperature change rate in the first main area is different before and after the first division time point, wherein the first filter is coated with a first catalyst which mediates a reaction to the contaminants, and the first division time point is after a time point when a reaction based on the first catalyst starts, wherein the heating unit is configured to emit heat so that a temperature of the second main area is included in a predetermined temperature range, wherein the predetermined temperature range at least includes an activation temperature of the first catalyst, when the air purification apparatus operates in the cleaning mode, wherein the control unit is configured to determine that cleaning of the air purification apparatus has been started, when the operation section in the cleaning mode includes the first division time point, or when a temperature of the second main area is higher than or equal to a predetermined cleaning start temperature. a first flow path which is a movement path of air; a second flow path which is a movement path of the air; a main pipe including a first filter positioned between the first flow path and the second flow path and configured to collect at least some of contaminants contained in the air, a first main area positioned between the first flow path and the first filter, and a second main area positioned between the second flow path and the first filter; a control unit configured to control the air purification apparatus to operate in a filtering mode or a cleaning mode, a heating unit controlled by the control unit and configured to emit heat to increase a temperature of the first filter for cleaning the first filter; and a first temperature detection unit connected to the control unit and configured to acquire information on the temperature in the first main area; wherein, in the filtering mode, at least some of the contaminants contained in the air introduced into the main pipe are collected in the first filter, wherein, in the cleaning mode at least some of the contaminants collected in the first filter in the filtering mode are removed, wherein the cleaning mode includes an operation section which includes a first section and a second section, and the first section and the second section are divided with respect to a first division time point, and a temperature change rate in the first main area is different before and after the first division time point, wherein the first filter is coated with a first catalyst which mediates a reaction to the contaminants, and the first division time point is after a time point when a reaction based on the first catalyst starts, wherein the heating unit is configured to emit heat so that a temperature of the second main area is included in a predetermined temperature range, wherein the predetermined temperature range at least includes an activation temperature of the first catalyst, when the air purification apparatus operates in the cleaning mode, wherein the control unit is configured to determine that cleaning of the air purification apparatus has been started, when the operation section in the cleaning mode includes the first division time point, or when a temperature of the second main area is higher than or equal to a predetermined cleaning start temperature.