Device and method for detecting pressure of pressure container with safety valve

The invention discloses a device for detecting the pressure of a pressure container with a safety valve. The device comprises an airflow flow rate sensor, a first pressure sensor, at least two secondpressure sensors and a processing terminal, wherein the airflow flow rate sensor is arranged at the outer side of an exhaust opening of the safety valve and is used for measuring the exhaust flow rateof the safety valve; the first pressure sensor is arranged at the inner side of the exhaust opening of the safety valve and is used for detecting the gas pressure at the inner side of the exhaust opening of the safety valve; the at least two second pressure sensors are arranged in the pressure container and are used for detecting the air pressure in the pressure container; the distance between the different second pressure sensors is greater than the smallest distance between the second pressure sensor and the first pressure sensor; and the processing terminal is in communication connection with the airflow flow rate