The embodiments of the present invention provide a method, device and ultrasonic imaging device for acquiring cardiac data. The embodiments of the present invention acquire a two-dimensional echocardiogram of a target object within a continuous time period, wherein the continuous time period is greater than one cardiac cycle, and the two-dimensional echocardiogram includes multiple frames of images. A speckle tracking algorithm is used to determine the edge contour of the left ventricle of each image in the two-dimensional echocardiogram. The target cardiac data value of the target object is determined according to the edge contour of the left ventricle of each image in the two-dimensional echocardiogram. In the process of acquiring cardiac data, a two-dimensional echocardiogram of more than one cardiac cycle is acquired, and the edge contour of the left ventricle in each acquired image is automatically and intelligently determined. The cardiac data is automatically determined according to the edge contour of the left ventricle, which reduces manual operations, shortens the time of the entire measurement process, improves the measurement speed, and reduces human-introduced errors. Therefore, the accuracy of the measurement results can be improved.
