Abstract: An intelligent pipeline pressure sensing device is disclosed. Conventionally, both blower and exhaust fan use the motor with fixed rotation speed to drive the fan blade, so the input/output airflow and pressure are also fixed. When the air inlet duct and air outlet duct are longer or have angle, or the filter is clogged, the drag in the air inlet and outlet ducts increases to cause the airflow or pressure therein to drop, which leads to inefficiency of the equipment and energy usage. The present invention is advantageous because the extent of clogging of the filter can be automatically detected and the user will be notified to wash or replace the filter, so the equipment can be operated at its best condition and in an energy-saving manner.