Pressure measuring device and pressure measuring method

The invention discloses a pressure measuring device and a pressure measuring method, and solves the technical problems that the pressure measuring device is difficult to extract a stratum sample with an accurate volume and the testing accuracy is poor. The device comprises an electric control pup joint, a power suction pup joint and a setting pushing pup joint, and the power suction pup joint comprises a power outer cylinder for bearing and supporting; the hydraulic mechanism is arranged in the power outer cylinder and used for controlling the setting pushing short section to be opened or retracted; the suction cavity is arranged in the power outer cylinder; the suction piston is vertically arranged in the suction cavity in a sliding manner; the power screw rod is vertically and rotatably connected into the power outer cylinder; the motor assembly is arranged in the power outer cylinder and used for controlling the power lead screw to rotate; the transmission part is vertically connected into the power outer