1. A method for calibrating a plurality of surveillance cameras, comprising: sampling a plurality of first images in a monitoring scene of the plurality of surveillance cameras by a sampling device and sampling a second image in the monitoring scene by each of the plurality of surveillance cameras; performing a feature matching on the plurality of first images to obtain a matching result between the plurality of first images; reconstructing a three-dimensional point set of the monitoring scene according to the matching result between the plurality of first images; and calculating parameters of each of the plurality of surveillance cameras according to the three-dimensional point set and the second image sampled by each of the plurality of surveillance cameras.