The invention relates to a stress-strain information measurement device and method for a thin-walled tube, in particular to a bidirectional stress state stress-strain measurement device and method for a thin-walled tube. The device and method are used for solving the problems that according to an existing device and method, accurate control over a stress path and accurate measurement of stress-strain information can not be achieved in a bidirectional stress state of the thin-walled tube, and the accurate stress-strain information can not be obtained when the thin-walled tube is in the bidirectional stress state. The device comprises a base, a strain gage, a movable beam, a pump station, an oil pressure booster, a force sensor, a pressure sensor, a control system, two upper chucks, two lower chucks, two lead screw pairs and two motors, wherein the two motors are installed on the base in parallel, and one lead screw pair is fixedly installed at the output end of each motor. The measurement method includes the main steps that firstly, the thin-walled tube is selected; secondly, the two ends of the thin-walled tube are fixed and sealed; thirdly, a bidirectional stress-strain experiment is started; fourthly, the stress-strain information is detected; fifthly, the thin-walled tube is broken, and experimental data are saved.