Differential pressure measuring device and method

The invention discloses a differential pressure measuring device and a differential pressure measuring method based on solenoid valve control. The differential pressure measuring device comprises an electromagnetic valve, a pressure sensor, air tubes, a data processing module and a data line. With the differential pressure measuring device and method of the invention adopted, the problem of maladjustment in internal and external differential pressure measurement of an aerostat capsule existing in a traditional measuring device can be effectively solved, and a real-time requirement under a special working environment can be satisfied.