A cleaning system comprising: a vacuum cleaner comprising a dust collecting chamber (20, 50, 50', 50", 60); and a dust collecting station connectable with the vacuum cleaner and configured to remove the foreign substances collected in the dust collecting chamber, wherein the dust collecting station comprises: a seating portion comprising an opening configured to communicate with an inside of the dust collecting chamber, wherein the dust collecting chamber is configured to be seated on the seating portion in a case that the vacuum cleaner and the dust collecting station are connected; a suction device configured to generate a suction airflow that flows along a flow path formed between the opening of the seating portion and the suction device; a collecting portion arranged between the opening of the seating portion and the suction device, the collecting portion being configured to collect the foreign substances that are moved by the suction airflow while the suction airflow flows from the dust collecting chamber through the opening of the seating portion; a flow path control device configured to block at least a portion of the flow path to change intake airflow flowing into the dust collecting chamber while the suction device is operating; characterized in that the dust collecting station further comprises: a bypass unit configured to connect to at least the portion of the flow path to open and close at least the portion of the flow path to introduce air from outside the flow path into the flow path, wherein the bypass unit is configured to open the flow path to the outside while the suction device is operating to prevent a vacuum pressure inside the flow path from increasing to be greater than or equal to a predetermined value. a vacuum cleaner comprising a dust collecting chamber (20, 50, 50', 50", 60); and a dust collecting station connectable with the vacuum cleaner and configured to remove the foreign substances collected in the dust collecting chamber, wherein the dust collecting station comprises: a seating portion comprising an opening configured to communicate with an inside of the dust collecting chamber, wherein the dust collecting chamber is configured to be seated on the seating portion in a case that the vacuum cleaner and the dust collecting station are connected; a suction device configured to generate a suction airflow that flows along a flow path formed between the opening of the seating portion and the suction device; a collecting portion arranged between the opening of the seating portion and the suction device, the collecting portion being configured to collect the foreign substances that are moved by the suction airflow while the suction airflow flows from the dust collecting chamber through the opening of the seating portion; a flow path control device configured to block at least a portion of the flow path to change intake airflow flowing into the dust collecting chamber while the suction device is operating; a seating portion comprising an opening configured to communicate with an inside of the dust collecting chamber, wherein the dust collecting chamber is configured to be seated on the seating portion in a case that the vacuum cleaner and the dust collecting station are connected; a suction device configured to generate a suction airflow that flows along a flow path formed between the opening of the seating portion and the suction device; a collecting portion arranged between the opening of the seating portion and the suction device, the collecting portion being configured to collect the foreign substances that are moved by the suction airflow while the suction airflow flows from the dust collecting chamber through the opening of the seating portion; a flow path control device configured to block at least a portion of the flow path to change intake airflow flowing into the dust collecting chamber while the suction device is operating; <EOS>