The invention discloses a paver screed plate attitude control method and system. By detecting the angle of a vehicle body and a screed plate in the X-axis direction and the Y-axis direction, an actualelevation angle value and a lateral gradient value of the screed plate are calculated; before starting, a leveling cylinder is controlled to adjust the elevation angle of the screed plate to realizethe self-setting of the starting elevation angle; and in the forward state after starting, a method of controlling and adjusting the vibrating speed is adopted to realize the control over the elevation angle of the screed plate, and the function of a cross slope leveling instrument can be realized by detecting the angle of the screed plate in the X direction. The paver screed plate attitude control method and system first proposes that adjustment of the elevation angle of the screed plate is realized by adjusting the rotation speed of vibration in the paving forward state; and the matching ofthe paving speed and the vibrating speed is realized by the control over the elevation angle, and the compactness of a paved road surface is controlled.