1. A method for rapidly establishing an indoor wireless signal fingerprint database, comprising the following steps: constructing an indoor and outdoor combined three-dimensional (3D) scene model of a target building, predicting wireless signal field intensity information of 3D space, selecting a small quantity of testing points, within the target building, to perform manual field measurements and recording the wireless signal intensity information, correcting propagation model parameters depending on the difference between the actually measured wireless signal intensity information and the wireless signal intensity information calculated through the principle of the propagation model, predicting and establishing a wireless signal fingerprint database of the indoor and outdoor combined 3D scene model through the corrected propagation model parameters.