A method for obtaining a movement track, comprising: obtaining target image information captured by a current camera device; detecting whether a preset person is comprised within the target image information according to information related to the preset person; obtaining a current geographic location of the current camera device, and if the preset person is comprised within the target image information: predicting the movement track of the preset person according to the current geographic location of the current camera device and a motion state, the motion state comprising at least one of a current motion mode and a historical motion parameter of the preset person; predicting a current motion parameter of the preset person according to the motion state, wherein the current motion parameter comprises a current moving rate and a current moving direction, wherein different motion states correspond to different motion parameters; determining a distance according to the current motion parameter and the current geographic location, such that there are a suitable number of camera devices within the determined distance of the current camera device according to the current motion parameter and the current geographic location to capture the preset person and obtain the latest movement track of the preset person in time; wherein the numbers of the camera devices in the same distance are different depending on different geographic locations; obtaining (B 1) camera devices along the movement track; determining, from the camera devices obtained, a target camera device along the movement track so as to capture the preset person with the smallest number of camera devices, wherein the distance of the target camera device to the current geographic location is less than or equal to the determined distance, and whose direction corresponds to the current moving direction; and activating the target camera device to capture the preset person, and updating the movement track when the preset person is captured. obtaining target image information captured by a current camera device; detecting whether a preset person is comprised within the target image information according to information related to the preset person; obtaining a current geographic location of the current camera device, and if the preset person is comprised within the target image information: predicting the movement track of the preset person according to the current geographic location of the current camera device and a motion state, the motion state comprising at least one of a current motion mode and a historical motion parameter of the preset person; predicting a current motion parameter of the preset person according to the motion state, wherein the current motion parameter comprises a current moving rate and a current moving direction, wherein different motion states correspond to different motion parameters; determining a distance according to the current motion parameter and the current geographic location, such that there are a suitable number of camera devices within the determined distance of the current camera device according to the current motion parameter and the current geographic location to capture the preset person and obtain the latest movement track of the preset person in time; wherein the numbers of the camera devices in the same distance are different depending on different geographic locations; obtaining (B 1) camera devices along the movement track; determining, from the camera devices obtained, a target camera device along the movement track so as to capture the preset person with the smallest number of camera devices, wherein the distance of the target camera device to the current geographic location is less than or equal to the determined distance, and whose direction corresponds to the current moving direction; and activating the target camera device to capture the preset person, and updating the movement track when the preset person is captured. predicting the movement track of the preset person according to the current geographic location of the current camera device and a motion state, the motion state comprising at least one of a current motion mode and a historical motion parameter of the preset person; predicting a current motion parameter of the preset person according to the motion state, wherein the current motion parameter comprises a current moving rate and a current moving direction, wherein different motion states correspond to different motion parameters; determining a distance according to the current motion parameter and the current geographic location, such that there are a suitable number of camera devices within the determined distance of the current camera device according to the current motion parameter and the current geographic location to capture the preset person and obtain the latest movement track of the preset person in time; wherein the numbers of the camera devices in the same distance are different depending on different geographic locations; obtaining (B 1) camera devices along the movement track; determining, from the camera devices obtained, a target camera device along the movement track so as to capture the preset person with the smallest number of camera devices, wherein the distance of the target camera device to the current geographic location is less than or equal to the determined distance, and whose direction corresponds to the current moving direction; and activating the target camera device to capture the preset person, and updating the movement track when the preset person is captured.